diff --git a/app/javascript/mastodon/features/ui/components/actions_modal.js b/app/javascript/mastodon/features/ui/components/actions_modal.js
index 79a5a20ef6..9792eba5f7 100644
--- a/app/javascript/mastodon/features/ui/components/actions_modal.js
+++ b/app/javascript/mastodon/features/ui/components/actions_modal.js
@@ -27,7 +27,7 @@ export default class ActionsModal extends ImmutablePureComponent {
     return (
       <li key={`${text}-${i}`}>
         <a href={href} target='_blank' rel='noopener' onClick={this.props.onClick} data-index={i} className={classNames({ active })}>
-          {icon && <IconButton title={text} icon={icon} role='presentation' tabIndex='-1' />}
+          {icon && <IconButton title={text} icon={icon} role='presentation' tabIndex='-1' inverted />}
           <div>
             <div className={classNames({ 'actions-modal__item-label': !!meta })}>{text}</div>
             <div>{meta}</div>
diff --git a/app/javascript/styles/mastodon/about.scss b/app/javascript/styles/mastodon/about.scss
index 034c35e8a7..0a09a38d24 100644
--- a/app/javascript/styles/mastodon/about.scss
+++ b/app/javascript/styles/mastodon/about.scss
@@ -169,7 +169,7 @@ $small-breakpoint: 960px;
       background: $ui-base-color;
       font-size: 12px;
       font-weight: 500;
-      color: $ui-primary-color;
+      color: $darker-text-color;
       text-transform: uppercase;
       position: relative;
       z-index: 1;
@@ -186,10 +186,10 @@ $small-breakpoint: 960px;
     font-size: 16px;
     line-height: 30px;
     margin-bottom: 12px;
-    color: $ui-primary-color;
+    color: $darker-text-color;
 
     a {
-      color: $ui-highlight-color;
+      color: $highlight-text-color;
       text-decoration: underline;
     }
   }
@@ -202,11 +202,11 @@ $small-breakpoint: 960px;
       text-align: center;
       font-size: 12px;
       line-height: 18px;
-      color: $ui-primary-color;
+      color: $darker-text-color;
       margin-bottom: 0;
 
       a {
-        color: $ui-highlight-color;
+        color: $highlight-text-color;
         text-decoration: underline;
       }
     }
@@ -225,7 +225,7 @@ $small-breakpoint: 960px;
     font-family: inherit;
     font-size: inherit;
     line-height: inherit;
-    color: lighten($ui-primary-color, 10%);
+    color: transparentize($darker-text-color, 0.1);
   }
 
   h1 {
@@ -234,14 +234,14 @@ $small-breakpoint: 960px;
     line-height: 30px;
     font-weight: 500;
     margin-bottom: 20px;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
 
     small {
       font-family: 'mastodon-font-sans-serif', sans-serif;
       display: block;
       font-size: 18px;
       font-weight: 400;
-      color: $ui-base-lighter-color;
+      color: opacify($darker-text-color, 0.1);
     }
   }
 
@@ -251,7 +251,7 @@ $small-breakpoint: 960px;
     line-height: 26px;
     font-weight: 500;
     margin-bottom: 20px;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
   }
 
   h3 {
@@ -260,7 +260,7 @@ $small-breakpoint: 960px;
     line-height: 24px;
     font-weight: 500;
     margin-bottom: 20px;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
   }
 
   h4 {
@@ -269,7 +269,7 @@ $small-breakpoint: 960px;
     line-height: 24px;
     font-weight: 500;
     margin-bottom: 20px;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
   }
 
   h5 {
@@ -278,7 +278,7 @@ $small-breakpoint: 960px;
     line-height: 24px;
     font-weight: 500;
     margin-bottom: 20px;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
   }
 
   h6 {
@@ -287,7 +287,7 @@ $small-breakpoint: 960px;
     line-height: 24px;
     font-weight: 500;
     margin-bottom: 20px;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
   }
 
   ul,
@@ -354,10 +354,10 @@ $small-breakpoint: 960px;
         font-weight: 400;
         font-size: 16px;
         line-height: 30px;
-        color: $ui-primary-color;
+        color: $darker-text-color;
 
         a {
-          color: $ui-highlight-color;
+          color: $highlight-text-color;
           text-decoration: underline;
         }
       }
@@ -405,7 +405,7 @@ $small-breakpoint: 960px;
         font-size: 14px;
 
         &:hover {
-          color: $ui-secondary-color;
+          color: $darker-text-color;
         }
       }
 
@@ -478,10 +478,10 @@ $small-breakpoint: 960px;
     font-weight: 400;
     font-size: 16px;
     line-height: 30px;
-    color: $ui-primary-color;
+    color: $darker-text-color;
 
     a {
-      color: $ui-highlight-color;
+      color: $highlight-text-color;
       text-decoration: underline;
     }
   }
@@ -517,7 +517,7 @@ $small-breakpoint: 960px;
 
       span {
         &:last-child {
-          color: $ui-secondary-color;
+          color: $darker-text-color;
         }
       }
 
@@ -548,7 +548,7 @@ $small-breakpoint: 960px;
         font-size: 14px;
         line-height: 24px;
         font-weight: 500;
-        color: $ui-primary-color;
+        color: $darker-text-color;
         padding-bottom: 5px;
         margin-bottom: 15px;
         border-bottom: 1px solid lighten($ui-base-color, 4%);
@@ -559,7 +559,7 @@ $small-breakpoint: 960px;
         a,
         span {
           font-weight: 400;
-          color: darken($ui-primary-color, 10%);
+          color: opacify($darker-text-color, 0.1);
         }
 
         a {
@@ -602,7 +602,7 @@ $small-breakpoint: 960px;
 
         .username {
           display: block;
-          color: $ui-primary-color;
+          color: $darker-text-color;
         }
       }
     }
@@ -775,7 +775,7 @@ $small-breakpoint: 960px;
     }
 
     p a {
-      color: $ui-secondary-color;
+      color: $darker-text-color;
     }
 
     h1 {
@@ -784,10 +784,10 @@ $small-breakpoint: 960px;
       margin-bottom: 0;
 
       small {
-        color: $ui-primary-color;
+        color: $darker-text-color;
 
         span {
-          color: $ui-secondary-color;
+          color: $darker-text-color;
         }
       }
     }
@@ -896,7 +896,7 @@ $small-breakpoint: 960px;
       }
 
       a {
-        color: $ui-secondary-color;
+        color: $darker-text-color;
         text-decoration: none;
       }
     }
@@ -935,7 +935,7 @@ $small-breakpoint: 960px;
 
         .fa {
           display: block;
-          color: $ui-primary-color;
+          color: $darker-text-color;
           font-size: 48px;
         }
       }
@@ -943,7 +943,7 @@ $small-breakpoint: 960px;
       .text {
         font-size: 16px;
         line-height: 30px;
-        color: $ui-primary-color;
+        color: $darker-text-color;
 
         h6 {
           font-size: inherit;
@@ -969,10 +969,10 @@ $small-breakpoint: 960px;
     font-weight: 400;
     font-size: 16px;
     line-height: 30px;
-    color: $ui-primary-color;
+    color: $darker-text-color;
 
     a {
-      color: $ui-highlight-color;
+      color: $highlight-text-color;
       text-decoration: underline;
     }
   }
@@ -980,7 +980,7 @@ $small-breakpoint: 960px;
   .footer-links {
     padding-bottom: 50px;
     text-align: right;
-    color: $ui-base-lighter-color;
+    color: $darker-text-color;
 
     p {
       font-size: 14px;
@@ -995,7 +995,7 @@ $small-breakpoint: 960px;
   &__footer {
     margin-top: 10px;
     text-align: center;
-    color: $ui-base-lighter-color;
+    color: $darker-text-color;
 
     p {
       font-size: 14px;
diff --git a/app/javascript/styles/mastodon/accounts.scss b/app/javascript/styles/mastodon/accounts.scss
index 0b49da1ade..f9af6f2888 100644
--- a/app/javascript/styles/mastodon/accounts.scss
+++ b/app/javascript/styles/mastodon/accounts.scss
@@ -75,7 +75,7 @@
     small {
       display: block;
       font-size: 14px;
-      color: $ui-highlight-color;
+      color: $highlight-text-color;
       font-weight: 400;
       overflow: hidden;
       text-overflow: ellipsis;
@@ -113,7 +113,7 @@
     width: 33.3%;
     box-sizing: border-box;
     flex: 0 0 auto;
-    color: $ui-primary-color;
+    color: $darker-text-color;
     padding: 5px 10px 0;
     margin-bottom: 10px;
     border-right: 1px solid lighten($ui-base-color, 4%);
@@ -143,7 +143,7 @@
 
     &.active {
       &::after {
-        border-bottom: 4px solid $ui-highlight-color;
+        border-bottom: 4px solid $highlight-text-color;
         opacity: 1;
       }
     }
@@ -178,7 +178,7 @@
     font-size: 14px;
     line-height: 18px;
     padding: 0 15px;
-    color: $ui-secondary-color;
+    color: $darker-text-color;
   }
 
   @media screen and (max-width: 480px) {
@@ -256,7 +256,7 @@
   .current {
     background: $simple-background-color;
     border-radius: 100px;
-    color: $ui-base-color;
+    color: $lighter-text-color;
     cursor: default;
     margin: 0 10px;
   }
@@ -268,7 +268,7 @@
   .older,
   .newer {
     text-transform: uppercase;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
   }
 
   .older {
@@ -293,7 +293,7 @@
 
   .disabled {
     cursor: default;
-    color: lighten($ui-base-color, 10%);
+    color: opacify($lighter-text-color, 0.1);
   }
 
   @media screen and (max-width: 700px) {
@@ -332,7 +332,7 @@
     width: 335px;
     background: $simple-background-color;
     border-radius: 4px;
-    color: $ui-base-color;
+    color: $lighter-text-color;
     margin: 0 5px 10px;
     position: relative;
 
@@ -344,7 +344,7 @@
       overflow: hidden;
       height: 100px;
       border-radius: 4px 4px 0 0;
-      background-color: lighten($ui-base-color, 4%);
+      background-color: opacify($lighter-text-color, 0.04);
       background-size: cover;
       background-position: center;
       position: relative;
@@ -392,7 +392,7 @@
 
       a {
         display: block;
-        color: $ui-base-color;
+        color: $inverted-text-color;
         text-decoration: none;
         text-overflow: ellipsis;
         overflow: hidden;
@@ -414,7 +414,7 @@
     }
 
     .username {
-      color: lighten($ui-base-color, 34%);
+      color: $lighter-text-color;
       font-size: 14px;
       font-weight: 400;
     }
@@ -422,7 +422,7 @@
     .account__header__content {
       padding: 10px 15px;
       padding-top: 15px;
-      color: lighten($ui-base-color, 26%);
+      color: transparentize($lighter-text-color, 0.1);
       word-wrap: break-word;
       overflow: hidden;
       text-overflow: ellipsis;
@@ -434,7 +434,7 @@
 .nothing-here {
   width: 100%;
   display: block;
-  color: $ui-primary-color;
+  color: $lighter-text-color;
   font-size: 14px;
   font-weight: 500;
   text-align: center;
@@ -493,7 +493,7 @@
 
       span {
         font-size: 14px;
-        color: $ui-primary-color;
+        color: $inverted-text-color;
       }
     }
 
@@ -508,7 +508,7 @@
 
   .account__header__content {
     font-size: 14px;
-    color: $ui-base-color;
+    color: $darker-text-color;
   }
 }
 
@@ -522,18 +522,18 @@
     display: inline-block;
     padding: 15px;
     text-decoration: none;
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
     text-transform: uppercase;
     font-weight: 500;
 
     &:hover,
     &:active,
     &:focus {
-      color: lighten($ui-highlight-color, 8%);
+      color: lighten($highlight-text-color, 8%);
     }
 
     &.active {
-      color: $ui-base-color;
+      color: $inverted-text-color;
       cursor: default;
     }
   }
@@ -586,19 +586,19 @@
     font-weight: 500;
     text-align: center;
     width: 94px;
-    color: $ui-secondary-color;
+    color: opacify($darker-text-color, 0.1);
     background: rgba(darken($ui-base-color, 8%), 0.5);
   }
 
   td {
-    color: $ui-primary-color;
+    color: $darker-text-color;
     text-align: center;
     width: 100%;
     padding-left: 0;
   }
 
   a {
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
     text-decoration: none;
 
     &:hover,
diff --git a/app/javascript/styles/mastodon/admin.scss b/app/javascript/styles/mastodon/admin.scss
index 6bd6590301..348f72078e 100644
--- a/app/javascript/styles/mastodon/admin.scss
+++ b/app/javascript/styles/mastodon/admin.scss
@@ -33,7 +33,7 @@
       a {
         display: block;
         padding: 15px;
-        color: rgba($primary-text-color, 0.7);
+        color: $darker-text-color;
         text-decoration: none;
         transition: all 200ms linear;
         border-radius: 4px 0 0 4px;
@@ -90,7 +90,7 @@
     padding-left: 25px;
 
     h2 {
-      color: $ui-secondary-color;
+      color: $primary-text-color;
       font-size: 24px;
       line-height: 28px;
       font-weight: 400;
@@ -98,7 +98,7 @@
     }
 
     h3 {
-      color: $ui-secondary-color;
+      color: $primary-text-color;
       font-size: 20px;
       line-height: 28px;
       font-weight: 400;
@@ -109,7 +109,7 @@
       text-transform: uppercase;
       font-size: 13px;
       font-weight: 500;
-      color: $ui-primary-color;
+      color: $primary-text-color;
       padding-bottom: 8px;
       margin-bottom: 8px;
       border-bottom: 1px solid lighten($ui-base-color, 8%);
@@ -117,7 +117,7 @@
 
     h6 {
       font-size: 16px;
-      color: $ui-secondary-color;
+      color: $primary-text-color;
       line-height: 28px;
       font-weight: 400;
     }
@@ -125,7 +125,7 @@
     & > p {
       font-size: 14px;
       line-height: 18px;
-      color: $ui-secondary-color;
+      color: $darker-text-color;
       margin-bottom: 20px;
 
       strong {
@@ -153,10 +153,10 @@
     }
 
     .muted-hint {
-      color: $ui-primary-color;
+      color: $darker-text-color;
 
       a {
-        color: $ui-highlight-color;
+        color: $highlight-text-color;
       }
     }
 
@@ -253,7 +253,7 @@
 
     a {
       display: inline-block;
-      color: rgba($primary-text-color, 0.7);
+      color: $darker-text-color;
       text-decoration: none;
       text-transform: uppercase;
       font-size: 12px;
@@ -266,7 +266,7 @@
       }
 
       &.selected {
-        color: $ui-highlight-color;
+        color: $highlight-text-color;
         border-bottom: 2px solid $ui-highlight-color;
       }
     }
@@ -291,7 +291,7 @@
     font-weight: 500;
     font-size: 14px;
     line-height: 18px;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
 
     @each $lang in $cjk-langs {
       &:lang(#{$lang}) {
@@ -348,7 +348,7 @@
     padding: 7px 4px;
     margin-bottom: 10px;
     font-size: 16px;
-    color: $ui-base-color;
+    color: $inverted-text-color;
     display: block;
     width: 100%;
     outline: 0;
@@ -402,7 +402,7 @@
   font-size: 14px;
 
   a {
-    color: $classic-highlight-color;
+    color: $highlight-text-color;
     text-decoration: none;
 
     &:hover {
@@ -425,7 +425,7 @@
     align-items: center;
     padding: 10px;
     background: $ui-base-color;
-    color: $ui-primary-color;
+    color: $darker-text-color;
     border-radius: 4px 4px 0 0;
     font-size: 14px;
     position: relative;
@@ -452,14 +452,14 @@
   }
 
   &__timestamp {
-    color: lighten($ui-base-color, 34%);
+    color: $darker-text-color;
   }
 
   &__extras {
     background: lighten($ui-base-color, 6%);
     border-radius: 0 0 4px 4px;
     padding: 10px;
-    color: $ui-primary-color;
+    color: $darker-text-color;
     font-family: 'mastodon-font-monospace', monospace;
     font-size: 12px;
     word-wrap: break-word;
@@ -469,7 +469,7 @@
   &__icon {
     font-size: 28px;
     margin-right: 10px;
-    color: lighten($ui-base-color, 34%);
+    color: $darker-text-color;
   }
 
   &__icon__overlay {
@@ -485,7 +485,7 @@
     }
 
     &.negative {
-      background: $error-red;
+      background: lighten($error-red, 12%);
     }
 
     &.neutral {
@@ -496,17 +496,17 @@
   a,
   .username,
   .target {
-    color: $ui-secondary-color;
+    color: $primary-text-color;
     text-decoration: none;
     font-weight: 500;
   }
 
   .diff-old {
-    color: $error-red;
+    color: lighten($error-red, 12%);
   }
 
   .diff-neutral {
-    color: $ui-secondary-color;
+    color: $darker-text-color;
   }
 
   .diff-new {
diff --git a/app/javascript/styles/mastodon/basics.scss b/app/javascript/styles/mastodon/basics.scss
index bec0d4d91a..c52e069be6 100644
--- a/app/javascript/styles/mastodon/basics.scss
+++ b/app/javascript/styles/mastodon/basics.scss
@@ -75,7 +75,7 @@ body {
   &.error {
     position: absolute;
     text-align: center;
-    color: $ui-primary-color;
+    color: $darker-text-color;
     background: $ui-base-color;
     width: 100%;
     height: 100%;
diff --git a/app/javascript/styles/mastodon/boost.scss b/app/javascript/styles/mastodon/boost.scss
index 31053decce..8e11cb5960 100644
--- a/app/javascript/styles/mastodon/boost.scss
+++ b/app/javascript/styles/mastodon/boost.scss
@@ -6,13 +6,13 @@
 }
 
 button.icon-button i.fa-retweet {
-  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='22' height='209'><path d='M4.97 3.16c-.1.03-.17.1-.22.18L.8 8.24c-.2.3.03.78.4.8H3.6v2.68c0 4.26-.55 3.62 3.66 3.62h7.66l-2.3-2.84c-.03-.02-.03-.04-.05-.06H7.27c-.44 0-.72-.3-.72-.72v-2.7h2.5c.37.03.63-.48.4-.77L5.5 3.35c-.12-.17-.34-.25-.53-.2zm12.16.43c-.55-.02-1.32.02-2.4.02H7.1l2.32 2.85.03.06h5.25c.42 0 .72.28.72.72v2.7h-2.5c-.36.02-.56.54-.3.8l3.92 4.9c.18.25.6.25.78 0l3.94-4.9c.26-.28 0-.83-.37-.8H18.4v-2.7c0-3.15.4-3.62-1.25-3.66z' fill='#{hex-color($ui-base-lighter-color)}' stroke-width='0'/><path d='M7.78 19.66c-.24.02-.44.25-.44.5v2.46h-.06c-1.08 0-1.86-.03-2.4-.03-1.64 0-1.25.43-1.25 3.65v4.47c0 4.26-.56 3.62 3.65 3.62H8.5l-1.3-1.06c-.1-.08-.18-.2-.2-.3-.02-.17.06-.35.2-.45l1.33-1.1H7.28c-.44 0-.72-.3-.72-.7v-4.48c0-.44.28-.72.72-.72h.06v2.5c0 .38.54.63.82.38l4.9-3.93c.25-.18.25-.6 0-.78l-4.9-3.92c-.1-.1-.24-.14-.38-.12zm9.34 2.93c-.54-.02-1.3.02-2.4.02h-1.25l1.3 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.57.2.65.5h-2.43c-.34.05-.53.52-.3.78l3.92 4.95c.18.24.6.24.78 0l3.94-4.94c.22-.27-.02-.76-.37-.77H18.4c.02-3.9.6-3.4-3.66-3.4H7.28c-1.08 0-1.86-.04-2.4-.04zm.15 2.46c-.1.03-.2.1-.28.2l-3.94 4.9c-.2.28.03.77.4.78H3.6c-.02 3.94-.45 3.4 3.66 3.4h7.44c3.65 0 3.74.3 3.7-2.25l-1.1 1.34c-.1.1-.2.17-.32.2-.16 0-.34-.08-.44-.2l-1.65-2.03c-.06.02-.1.04-.18.04H7.28c-.35 0-.57-.2-.66-.5h2.44c.37 0 .63-.5.4-.78l-3.96-4.9c-.1-.15-.3-.23-.47-.2zM4.88 117.6c-1.16 0-1.3.3-1.3 1.56l1.14-1.38c.08-.1.22-.14.34-.16.16 0 .34.04.44.16l2.22 2.75h7c.42 0 .72.28.72.72v.53h-2.6c-.3.1-.43.54-.2.78l3.92 4.9c.18.25.6.25.78 0l3.94-4.9c.22-.28-.02-.77-.37-.78H18.4v-.53c0-4.2.72-3.63-3.66-3.63H7.28c-1.08 0-1.86-.03-2.4-.03zm.1 1.74c-.1.03-.17.1-.23.16L.8 124.44c-.2.28.03.77.4.78H3.6v.5c0 4.26-.55 3.62 3.66 3.62h7.44c1.03 0 1.74.02 2.28 0-.16.02-.34-.03-.44-.15l-2.22-2.76H7.28c-.44 0-.72-.3-.72-.72v-.5h2.5c.37.02.63-.5.4-.78L5.5 119.5c-.12-.15-.34-.22-.53-.16zm12.02 10c1.2-.02 1.4-.25 1.4-1.53l-1.1 1.36c-.07.1-.17.17-.3.18zM5.94 136.6l2.37 2.93h6.42c.42 0 .72.28.72.72v1.25h-2.6c-.3.1-.43.54-.2.78l3.92 4.9c.18.25.6.25.78 0l3.94-4.9c.22-.28-.02-.77-.37-.78H18.4v-1.25c0-4.2.72-3.63-3.66-3.63H7.28c-.6 0-.92-.02-1.34-.03zm-1.72.06c-.4.08-.54.3-.6.75l.6-.74zm.84.93c-.12 0-.24.08-.3.18l-3.95 4.9c-.24.3 0 .83.4.82H3.6v1.22c0 4.26-.55 3.62 3.66 3.62h7.44c.63 0 .97.02 1.4.03l-2.37-2.93H7.28c-.44 0-.72-.3-.72-.72v-1.22h2.5c.4.04.67-.53.4-.8l-3.96-4.92c-.1-.13-.27-.2-.44-.2zm13.28 10.03l-.56.7c.36-.07.5-.3.56-.7zM17.13 155.6c-.55-.02-1.32.03-2.4.03h-8.2l2.38 2.9h5.82c.42 0 .72.28.72.72v1.97H12.9c-.32.06-.48.52-.28.78l3.94 4.94c.2.23.6.22.78-.03l3.94-4.9c.22-.28-.02-.77-.37-.78H18.4v-1.97c0-3.15.4-3.62-1.25-3.66zm-12.1.28c-.1.02-.2.1-.28.18l-3.94 4.9c-.2.3.03.78.4.8H3.6v1.96c0 4.26-.55 3.62 3.66 3.62h8.24l-2.36-2.9H7.28c-.44 0-.72-.3-.72-.72v-1.97h2.5c.37.02.63-.5.4-.78l-3.96-4.9c-.1-.15-.3-.22-.47-.2zM5.13 174.5c-.15 0-.3.07-.38.2L.8 179.6c-.24.27 0 .82.4.8H3.6v2.32c0 4.26-.55 3.62 3.66 3.62h7.94l-2.35-2.9h-5.6c-.43 0-.7-.3-.7-.72v-2.3h2.5c.38.03.66-.54.4-.83l-3.97-4.9c-.1-.13-.23-.2-.38-.2zm12 .1c-.55-.02-1.32.03-2.4.03H6.83l2.35 2.9h5.52c.42 0 .72.28.72.72v2.34h-2.6c-.3.1-.43.53-.2.78l3.92 4.9c.18.24.6.24.78 0l3.94-4.9c.22-.3-.02-.78-.37-.8H18.4v-2.33c0-3.15.4-3.62-1.25-3.66zM4.97 193.16c-.1.03-.17.1-.22.18l-3.94 4.9c-.2.3.03.78.4.8H3.6v2.68c0 4.26-.55 3.62 3.66 3.62h7.66l-2.3-2.84c-.03-.02-.03-.04-.05-.06H7.27c-.44 0-.72-.3-.72-.72v-2.7h2.5c.37.03.63-.48.4-.77l-3.96-4.9c-.12-.17-.34-.25-.53-.2zm12.16.43c-.55-.02-1.32.03-2.4.03H7.1l2.32 2.84.03.06h5.25c.42 0 .72.28.72.72v2.7h-2.5c-.36.02-.56.54-.3.8l3.92 4.9c.18.25.6.25.78 0l3.94-4.9c.26-.28 0-.83-.37-.8H18.4v-2.7c0-3.15.4-3.62-1.25-3.66z' fill='#{hex-color($highlight-text-color)}' stroke-width='0'/></svg>");
 }
diff --git a/app/javascript/styles/mastodon/compact_header.scss b/app/javascript/styles/mastodon/compact_header.scss
index 90d98cc8c5..83ac7a8d04 100644
--- a/app/javascript/styles/mastodon/compact_header.scss
+++ b/app/javascript/styles/mastodon/compact_header.scss
@@ -2,7 +2,7 @@
   h1 {
     font-size: 24px;
     line-height: 28px;
-    color: $ui-primary-color;
+    color: $primary-text-color;
     font-weight: 500;
     margin-bottom: 20px;
     padding: 0 10px;
@@ -20,7 +20,7 @@
 
     small {
       font-weight: 400;
-      color: $ui-secondary-color;
+      color: $darker-text-color;
     }
 
     img {
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 96112d84a7..cdf3a9daa7 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -4,7 +4,7 @@
 }
 
 .button {
-  background-color: darken($ui-highlight-color, 3%);
+  background-color: $ui-highlight-color;
   border: 10px none;
   border-radius: 4px;
   box-sizing: border-box;
@@ -31,7 +31,7 @@
   &:active,
   &:focus,
   &:hover {
-    background-color: lighten($ui-highlight-color, 7%);
+    background-color: lighten($ui-highlight-color, 4%);
     transition: all 200ms ease-out;
   }
 
@@ -52,7 +52,7 @@
   }
 
   &.button-alternative {
-    color: $ui-base-color;
+    color: $inverted-text-color;
     background: $ui-primary-color;
 
     &:active,
@@ -98,26 +98,10 @@
   position: relative;
 }
 
-.column-icon {
-  background: lighten($ui-base-color, 4%);
-  color: $ui-primary-color;
-  cursor: pointer;
-  font-size: 16px;
-  padding: 15px;
-  position: absolute;
-  right: 0;
-  top: -48px;
-  z-index: 3;
-
-  &:hover {
-    color: lighten($ui-primary-color, 7%);
-  }
-}
-
 .icon-button {
   display: inline-block;
   padding: 0;
-  color: $ui-base-lighter-color;
+  color: $action-button-color;
   border: none;
   background: transparent;
   cursor: pointer;
@@ -126,17 +110,17 @@
   &:hover,
   &:active,
   &:focus {
-    color: lighten($ui-base-color, 33%);
+    color: lighten($action-button-color, 7%);
     transition: color 200ms ease-out;
   }
 
   &.disabled {
-    color: lighten($ui-base-color, 13%);
+    color: darken($action-button-color, 13%);
     cursor: default;
   }
 
   &.active {
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
   }
 
   &::-moz-focus-inner {
@@ -150,23 +134,23 @@
   }
 
   &.inverted {
-    color: lighten($ui-base-color, 33%);
+    color: $lighter-text-color;
 
     &:hover,
     &:active,
     &:focus {
-      color: $ui-base-lighter-color;
+      color: transparentize($lighter-text-color, 0.07);
     }
 
     &.disabled {
-      color: $ui-primary-color;
+      color: opacify($lighter-text-color, 0.07);
     }
 
     &.active {
-      color: $ui-highlight-color;
+      color: $highlight-text-color;
 
       &.disabled {
-        color: lighten($ui-highlight-color, 13%);
+        color: opacify($lighter-text-color, 0.13);
       }
     }
   }
@@ -185,7 +169,7 @@
 }
 
 .text-icon-button {
-  color: lighten($ui-base-color, 33%);
+  color: $lighter-text-color;
   border: none;
   background: transparent;
   cursor: pointer;
@@ -199,17 +183,17 @@
   &:hover,
   &:active,
   &:focus {
-    color: $ui-base-lighter-color;
+    color: opacify($lighter-text-color, 0.07);
     transition: color 200ms ease-out;
   }
 
   &.disabled {
-    color: lighten($ui-base-color, 13%);
+    color: transparentize($lighter-text-color, 0.2);
     cursor: default;
   }
 
   &.active {
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
   }
 
   &::-moz-focus-inner {
@@ -228,25 +212,6 @@
   transform-origin: 50% 0;
 }
 
-.dropdown--active .icon-button {
-  color: $ui-highlight-color;
-}
-
-.dropdown--active::after {
-  @media screen and (min-width: 631px) {
-    content: "";
-    display: block;
-    position: absolute;
-    width: 0;
-    height: 0;
-    border-style: solid;
-    border-width: 0 4.5px 7.8px;
-    border-color: transparent transparent $ui-secondary-color;
-    bottom: 8px;
-    right: 104px;
-  }
-}
-
 .invisible {
   font-size: 0;
   line-height: 0;
@@ -271,15 +236,11 @@
   }
 }
 
-.lightbox .icon-button {
-  color: $ui-base-color;
-}
-
 .compose-form {
   padding: 10px;
 
   .compose-form__warning {
-    color: darken($ui-secondary-color, 65%);
+    color: $inverted-text-color;
     margin-bottom: 15px;
     background: $ui-primary-color;
     box-shadow: 0 2px 6px rgba($base-shadow-color, 0.3);
@@ -289,7 +250,7 @@
     font-weight: 400;
 
     strong {
-      color: darken($ui-secondary-color, 65%);
+      color: $inverted-text-color;
       font-weight: 500;
 
       @each $lang in $cjk-langs {
@@ -300,7 +261,7 @@
     }
 
     a {
-      color: darken($ui-primary-color, 33%);
+      color: $lighter-text-color;
       font-weight: 500;
       text-decoration: underline;
 
@@ -333,7 +294,7 @@
     box-sizing: border-box;
     width: 100%;
     margin: 0;
-    color: $ui-base-color;
+    color: $inverted-text-color;
     background: $simple-background-color;
     padding: 10px;
     font-family: inherit;
@@ -378,7 +339,7 @@
     box-shadow: 4px 4px 6px rgba($base-shadow-color, 0.4);
     background: $ui-secondary-color;
     border-radius: 0 0 4px 4px;
-    color: $ui-base-color;
+    color: $lighter-text-color;
     font-size: 14px;
     padding: 6px;
 
@@ -419,11 +380,11 @@
   }
 
   .autosuggest-account .display-name__account {
-    color: lighten($ui-base-color, 36%);
+    color: $lighter-text-color;
   }
 
   .compose-form__modifiers {
-    color: $ui-base-color;
+    color: $inverted-text-color;
     font-family: inherit;
     font-size: 14px;
     background: $simple-background-color;
@@ -454,7 +415,7 @@
 
         .icon-button {
           flex: 0 1 auto;
-          color: $ui-secondary-color;
+          color: $action-button-color;
           font-size: 14px;
           font-weight: 500;
           padding: 10px;
@@ -463,7 +424,7 @@
           &:hover,
           &:focus,
           &:active {
-            color: lighten($ui-secondary-color, 4%);
+            color: lighten($action-button-color, 7%);
           }
         }
 
@@ -486,7 +447,7 @@
 
         input {
           background: transparent;
-          color: $ui-secondary-color;
+          color: $primary-text-color;
           border: 0;
           padding: 0;
           margin: 0;
@@ -501,7 +462,7 @@
 
           &::placeholder {
             opacity: 0.54;
-            color: $ui-secondary-color;
+            color: $darker-text-color;
           }
         }
 
@@ -563,7 +524,7 @@
         font-family: 'mastodon-font-sans-serif', sans-serif;
         font-size: 14px;
         font-weight: 600;
-        color: lighten($ui-base-color, 12%);
+        color: $lighter-text-color;
 
         &.character-counter--over {
           color: $warning-red;
@@ -617,7 +578,7 @@
 }
 
 .reply-indicator__display-name {
-  color: $ui-base-color;
+  color: $lighter-text-color;
   display: block;
   max-width: 100%;
   line-height: 24px;
@@ -679,7 +640,7 @@
       text-decoration: underline;
 
       .fa {
-        color: lighten($ui-base-color, 40%);
+        color: lighten($action-button-color, 7%);
       }
     }
 
@@ -694,15 +655,15 @@
     }
 
     .fa {
-      color: lighten($ui-base-color, 30%);
+      color: $action-button-color;
     }
   }
 
   .status__content__spoiler-link {
-    background: lighten($ui-base-color, 30%);
+    background: $action-button-color;
 
     &:hover {
-      background: lighten($ui-base-color, 33%);
+      background: lighten($action-button-color, 7%);
       text-decoration: none;
     }
   }
@@ -721,7 +682,7 @@
   border-radius: 2px;
   background: transparent;
   border: 0;
-  color: lighten($ui-base-color, 8%);
+  color: $lighter-text-color;
   font-weight: 700;
   font-size: 11px;
   padding: 0 6px;
@@ -784,36 +745,32 @@
 
   &.status-direct {
     background: lighten($ui-base-color, 8%);
-
-    .icon-button.disabled {
-      color: lighten($ui-base-color, 16%);
-    }
   }
 
   &.light {
     .status__relative-time {
-      color: $ui-primary-color;
+      color: $lighter-text-color;
     }
 
     .status__display-name {
-      color: $ui-base-color;
+      color: $inverted-text-color;
     }
 
     .display-name {
       strong {
-        color: $ui-base-color;
+        color: $inverted-text-color;
       }
 
       span {
-        color: $ui-primary-color;
+        color: $lighter-text-color;
       }
     }
 
     .status__content {
-      color: $ui-base-color;
+      color: $inverted-text-color;
 
       a {
-        color: $ui-highlight-color;
+        color: $highlight-text-color;
       }
 
       a.status__content__spoiler-link {
@@ -833,19 +790,19 @@
     background: transparent;
 
     .icon-button.disabled {
-      color: lighten($ui-base-color, 13%);
+      color: lighten($action-button-color, 13%);
     }
   }
 }
 
 .status__relative-time {
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
   float: right;
   font-size: 14px;
 }
 
 .status__display-name {
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
 }
 
 .status__info .status__display-name {
@@ -896,14 +853,14 @@
 
 .status__prepend {
   margin-left: 68px;
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
   padding: 8px 0;
   padding-bottom: 2px;
   font-size: 14px;
   position: relative;
 
   .status__display-name strong {
-    color: $ui-base-lighter-color;
+    color: $darker-text-color;
   }
 
   > span {
@@ -965,7 +922,7 @@
 
 .detailed-status__meta {
   margin-top: 15px;
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
   font-size: 14px;
   line-height: 18px;
 }
@@ -993,11 +950,11 @@
 }
 
 .reply-indicator__content {
-  color: $ui-base-color;
+  color: $inverted-text-color;
   font-size: 14px;
 
   a {
-    color: lighten($ui-base-color, 20%);
+    color: $lighter-text-color;
   }
 }
 
@@ -1032,7 +989,7 @@
   .account__display-name {
     flex: 1 1 auto;
     display: block;
-    color: $ui-primary-color;
+    color: $darker-text-color;
     overflow: hidden;
     text-decoration: none;
     font-size: 14px;
@@ -1102,7 +1059,7 @@
     }
 
     .account__header__username {
-      color: $ui-primary-color;
+      color: $darker-text-color;
     }
   }
 
@@ -1112,7 +1069,7 @@
   }
 
   .account__header__content {
-    color: $ui-secondary-color;
+    color: $darker-text-color;
   }
 
   .account__header__display-name {
@@ -1127,7 +1084,7 @@
   }
 
   .account__header__username {
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
     font-size: 14px;
     font-weight: 400;
     display: block;
@@ -1140,7 +1097,7 @@
 .account__disclaimer {
   padding: 10px;
   border-top: 1px solid lighten($ui-base-color, 8%);
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
 
   strong {
     font-weight: 500;
@@ -1166,7 +1123,7 @@
 }
 
 .account__header__content {
-  color: $ui-primary-color;
+  color: $darker-text-color;
   font-size: 14px;
   font-weight: 400;
   overflow: hidden;
@@ -1243,7 +1200,7 @@
     display: block;
     text-transform: uppercase;
     font-size: 11px;
-    color: $ui-primary-color;
+    color: $darker-text-color;
   }
 
   strong {
@@ -1258,10 +1215,6 @@
       }
     }
   }
-
-  abbr {
-    color: $ui-base-lighter-color;
-  }
 }
 
 .account__header__avatar {
@@ -1331,7 +1284,7 @@
 }
 
 .detailed-status__display-name {
-  color: $ui-secondary-color;
+  color: $darker-text-color;
   display: block;
   line-height: 24px;
   margin-bottom: 15px;
@@ -1366,11 +1319,11 @@
 .muted {
   .status__content p,
   .status__content a {
-    color: $ui-base-lighter-color;
+    color: $darker-text-color;
   }
 
   .status__display-name strong {
-    color: $ui-base-lighter-color;
+    color: $darker-text-color;
   }
 
   .status__avatar {
@@ -1378,11 +1331,11 @@
   }
 
   a.status__content__spoiler-link {
-    background: $ui-base-lighter-color;
+    background: $darker-text-color;
     color: lighten($ui-base-color, 4%);
 
     &:hover {
-      background: lighten($ui-base-color, 29%);
+      background: transparentize($darker-text-color, 0.07);
       text-decoration: none;
     }
   }
@@ -1398,7 +1351,7 @@
   position: relative;
 
   .fa {
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
   }
 
   > span {
@@ -1501,7 +1454,7 @@
   display: flex;
   flex-shrink: 0;
   cursor: default;
-  color: $ui-primary-color;
+  color: $darker-text-color;
 
   strong {
     color: $primary-text-color;
@@ -1609,7 +1562,7 @@
     box-sizing: border-box;
     text-decoration: none;
     background: $ui-secondary-color;
-    color: $ui-base-color;
+    color: $inverted-text-color;
     overflow: hidden;
     text-overflow: ellipsis;
     white-space: nowrap;
@@ -1618,7 +1571,7 @@
     &:hover,
     &:active {
       background: $ui-highlight-color;
-      color: $ui-secondary-color;
+      color: $primary-text-color;
       outline: 0;
     }
   }
@@ -1660,7 +1613,7 @@
     box-sizing: border-box;
     text-decoration: none;
     background: $ui-secondary-color;
-    color: $ui-base-color;
+    color: $inverted-text-color;
     overflow: hidden;
     text-overflow: ellipsis;
     white-space: nowrap;
@@ -1671,7 +1624,7 @@
 
     &:hover {
       background: $ui-highlight-color;
-      color: $ui-secondary-color;
+      color: $primary-text-color;
     }
   }
 }
@@ -1683,7 +1636,7 @@
 .static-content {
   padding: 10px;
   padding-top: 20px;
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
 
   h1 {
     font-size: 16px;
@@ -1935,8 +1888,8 @@
   }
 
   &.active {
-    border-bottom: 2px solid $ui-highlight-color;
-    color: $ui-highlight-color;
+    border-bottom: 2px solid $highlight-text-color;
+    color: $highlight-text-color;
   }
 
   &:hover,
@@ -1991,7 +1944,7 @@
 
 .column-back-button {
   background: lighten($ui-base-color, 4%);
-  color: $ui-highlight-color;
+  color: $highlight-text-color;
   cursor: pointer;
   flex: 0 0 auto;
   font-size: 16px;
@@ -2010,7 +1963,7 @@
   background: lighten($ui-base-color, 4%);
   border: 0;
   font-family: inherit;
-  color: $ui-highlight-color;
+  color: $highlight-text-color;
   cursor: pointer;
   white-space: nowrap;
   font-size: 16px;
@@ -2182,7 +2135,7 @@
 
 .column-subheading {
   background: $ui-base-color;
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
   padding: 8px 20px;
   font-size: 12px;
   font-weight: 500;
@@ -2205,11 +2158,11 @@
   flex: 1 0 auto;
 
   p {
-    color: $ui-secondary-color;
+    color: $darker-text-color;
   }
 
   a {
-    color: $ui-base-lighter-color;
+    color: opacify($darker-text-color, 0.07);
   }
 }
 
@@ -2235,7 +2188,7 @@
 }
 
 .setting-text {
-  color: $ui-primary-color;
+  color: $darker-text-color;
   background: transparent;
   border: none;
   border-bottom: 2px solid $ui-primary-color;
@@ -2249,23 +2202,12 @@
   &:focus,
   &:active {
     color: $primary-text-color;
-    border-bottom-color: $ui-highlight-color;
+    border-bottom-color: $highlight-text-color;
   }
 
   @media screen and (max-width: 600px) {
     font-size: 16px;
   }
-
-  &.light {
-    color: $ui-base-color;
-    border-bottom: 2px solid lighten($ui-base-color, 27%);
-
-    &:focus,
-    &:active {
-      color: $ui-base-color;
-      border-bottom-color: $ui-highlight-color;
-    }
-  }
 }
 
 .no-reduce-motion button.icon-button i.fa-retweet {
@@ -2288,12 +2230,12 @@
 }
 
 .reduce-motion button.icon-button i.fa-retweet {
-  color: $ui-base-lighter-color;
+  color: $action-button-color;
   transition: color 100ms ease-in;
 }
 
 .reduce-motion button.icon-button.active i.fa-retweet {
-  color: $ui-highlight-color;
+  color: $highlight-text-color;
 }
 
 .status-card {
@@ -2301,7 +2243,7 @@
   font-size: 14px;
   border: 1px solid lighten($ui-base-color, 8%);
   border-radius: 4px;
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
   margin-top: 14px;
   text-decoration: none;
   overflow: hidden;
@@ -2439,7 +2381,7 @@ a.status-card {
 
 .load-more {
   display: block;
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
   background-color: transparent;
   border: 0;
   font-size: inherit;
@@ -2463,7 +2405,7 @@ a.status-card {
   text-align: center;
   font-size: 16px;
   font-weight: 500;
-  color: lighten($ui-base-color, 16%);
+  color: opacify($darker-text-color, 0.07);
   background: $ui-base-color;
   cursor: default;
   display: flex;
@@ -2503,7 +2445,7 @@ a.status-card {
     strong {
       display: block;
       margin-bottom: 10px;
-      color: lighten($ui-base-color, 34%);
+      color: $darker-text-color;
     }
 
     span {
@@ -2561,15 +2503,15 @@ a.status-card {
   }
 
   & > .column-header__back-button {
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
   }
 
   &.active {
-    box-shadow: 0 1px 0 rgba($ui-highlight-color, 0.3);
+    box-shadow: 0 1px 0 rgba($highlight-text-color, 0.3);
 
     .column-header__icon {
-      color: $ui-highlight-color;
-      text-shadow: 0 0 10px rgba($ui-highlight-color, 0.4);
+      color: $highlight-text-color;
+      text-shadow: 0 0 10px rgba($highlight-text-color, 0.4);
     }
   }
 
@@ -2615,7 +2557,7 @@ a.status-card {
   max-height: 70vh;
   overflow: hidden;
   overflow-y: auto;
-  color: $ui-primary-color;
+  color: $darker-text-color;
   transition: max-height 150ms ease-in-out, opacity 300ms linear;
   opacity: 1;
 
@@ -2644,7 +2586,7 @@ a.status-card {
 
 .column-header__setting-btn {
   &:hover {
-    color: lighten($ui-primary-color, 4%);
+    color: $darker-text-color;
     text-decoration: underline;
   }
 }
@@ -2678,7 +2620,7 @@ a.status-card {
 }
 
 .loading-indicator {
-  color: lighten($ui-base-color, 26%);
+  color: $darker-text-color;
   font-size: 12px;
   font-weight: 400;
   text-transform: uppercase;
@@ -2763,7 +2705,7 @@ a.status-card {
 
 .media-spoiler {
   background: $base-overlay-background;
-  color: $ui-primary-color;
+  color: $darker-text-color;
   border: 0;
   padding: 0;
   width: 100%;
@@ -2775,7 +2717,7 @@ a.status-card {
   &:active,
   &:focus {
     padding: 0;
-    color: lighten($ui-primary-color, 8%);
+    color: transparentize($darker-text-color, 0.07);
   }
 }
 
@@ -2828,7 +2770,7 @@ a.status-card {
 }
 
 .column-settings__section {
-  color: $ui-primary-color;
+  color: $darker-text-color;
   cursor: default;
   display: block;
   font-weight: 500;
@@ -2886,7 +2828,7 @@ a.status-card {
 
 .setting-toggle__label,
 .setting-meta__label {
-  color: $ui-primary-color;
+  color: $darker-text-color;
   display: inline-block;
   margin-bottom: 14px;
   margin-left: 8px;
@@ -2894,13 +2836,12 @@ a.status-card {
 }
 
 .setting-meta__label {
-  color: $ui-primary-color;
   float: right;
 }
 
 .empty-column-indicator,
 .error-column {
-  color: lighten($ui-base-color, 20%);
+  color: $darker-text-color;
   background: $ui-base-color;
   text-align: center;
   padding: 20px;
@@ -2917,7 +2858,7 @@ a.status-card {
   }
 
   a {
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
     text-decoration: none;
 
     &:hover {
@@ -3102,7 +3043,7 @@ a.status-card {
   display: flex;
   align-items: center;
   justify-content: center;
-  color: $ui-secondary-color;
+  color: $primary-text-color;
   font-size: 18px;
   font-weight: 500;
   border: 2px dashed $ui-base-lighter-color;
@@ -3111,7 +3052,7 @@ a.status-card {
 
 .upload-progress {
   padding: 10px;
-  color: $ui-base-lighter-color;
+  color: $lighter-text-color;
   overflow: hidden;
   display: flex;
 
@@ -3200,7 +3141,7 @@ a.status-card {
 }
 
 .privacy-dropdown__option {
-  color: $ui-base-color;
+  color: $lighter-text-color;
   padding: 10px;
   cursor: pointer;
   display: flex;
@@ -3233,12 +3174,12 @@ a.status-card {
 
 .privacy-dropdown__option__content {
   flex: 1 1 auto;
-  color: darken($ui-primary-color, 24%);
+  color: $lighter-text-color;
 
   strong {
     font-weight: 500;
     display: block;
-    color: $ui-base-color;
+    color: $inverted-text-color;
 
     @each $lang in $cjk-langs {
       &:lang(#{$lang}) {
@@ -3287,7 +3228,7 @@ a.status-card {
   padding-right: 30px;
   font-family: inherit;
   background: $ui-base-color;
-  color: $ui-primary-color;
+  color: $darker-text-color;
   font-size: 14px;
   margin: 0;
 
@@ -3344,6 +3285,7 @@ a.status-card {
   .fa-times-circle {
     top: 11px;
     transform: rotate(0deg);
+    color: $action-button-color;
     cursor: pointer;
 
     &.active {
@@ -3351,13 +3293,13 @@ a.status-card {
     }
 
     &:hover {
-      color: $primary-text-color;
+      color: lighten($action-button-color, 7%);
     }
   }
 }
 
 .search-results__header {
-  color: $ui-base-lighter-color;
+  color: $darker-text-color;
   background: lighten($ui-base-color, 2%);
   border-bottom: 1px solid darken($ui-base-color, 4%);
   padding: 15px 10px;
@@ -3386,7 +3328,7 @@ a.status-card {
     span {
       display: inline-block;
       background: $ui-base-color;
-      color: $ui-primary-color;
+      color: $darker-text-color;
       font-size: 14px;
       font-weight: 500;
       padding: 10px;
@@ -3405,13 +3347,13 @@ a.status-card {
 .search-results__hashtag {
   display: block;
   padding: 10px;
-  color: $ui-secondary-color;
+  color: darken($primary-text-color, 4%);
   text-decoration: none;
 
   &:hover,
   &:active,
   &:focus {
-    color: lighten($ui-secondary-color, 4%);
+    color: $primary-text-color;
     text-decoration: underline;
   }
 }
@@ -3549,7 +3491,7 @@ a.status-card {
 }
 
 .media-modal__button {
-  background-color: $white;
+  background-color: $primary-text-color;
   height: 12px;
   width: 12px;
   border-radius: 6px;
@@ -3560,7 +3502,7 @@ a.status-card {
 }
 
 .media-modal__button--active {
-  background-color: $ui-highlight-color;
+  background-color: $highlight-text-color;
 }
 
 .media-modal__close {
@@ -3574,7 +3516,7 @@ a.status-card {
 .error-modal,
 .embed-modal {
   background: $ui-secondary-color;
-  color: $ui-base-color;
+  color: $inverted-text-color;
   border-radius: 8px;
   overflow: hidden;
   display: flex;
@@ -3662,7 +3604,7 @@ a.status-card {
 
   .onboarding-modal__nav,
   .error-modal__nav {
-    color: darken($ui-secondary-color, 34%);
+    color: $lighter-text-color;
     border: 0;
     font-size: 14px;
     font-weight: 500;
@@ -3676,18 +3618,18 @@ a.status-card {
     &:hover,
     &:focus,
     &:active {
-      color: darken($ui-secondary-color, 38%);
+      color: transparentize($lighter-text-color, 0.04);
       background-color: darken($ui-secondary-color, 16%);
     }
 
     &.onboarding-modal__done,
     &.onboarding-modal__next {
-      color: $ui-base-color;
+      color: $inverted-text-color;
 
       &:hover,
       &:focus,
       &:active {
-        color: darken($ui-base-color, 4%);
+        color: lighten($inverted-text-color, 4%);
       }
     }
   }
@@ -3739,17 +3681,17 @@ a.status-card {
   h1 {
     font-size: 18px;
     font-weight: 500;
-    color: $ui-base-color;
+    color: $inverted-text-color;
     margin-bottom: 20px;
   }
 
   a {
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
 
     &:hover,
     &:focus,
     &:active {
-      color: lighten($ui-highlight-color, 4%);
+      color: lighten($highlight-text-color, 4%);
     }
   }
 
@@ -3759,7 +3701,7 @@ a.status-card {
 
   p {
     font-size: 16px;
-    color: lighten($ui-base-color, 8%);
+    color: $lighter-text-color;
     margin-top: 10px;
     margin-bottom: 10px;
 
@@ -3770,7 +3712,7 @@ a.status-card {
     strong {
       font-weight: 500;
       background: $ui-base-color;
-      color: $ui-secondary-color;
+      color: $primary-text-color;
       border-radius: 4px;
       font-size: 14px;
       padding: 3px 6px;
@@ -3822,7 +3764,7 @@ a.status-card {
 
   &__label {
     font-weight: 500;
-    color: $ui-base-color;
+    color: $inverted-text-color;
     margin-bottom: 5px;
     text-transform: uppercase;
     font-size: 12px;
@@ -3830,7 +3772,7 @@ a.status-card {
 
   &__case {
     background: $ui-base-color;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
     font-weight: 500;
     padding: 10px;
     border-radius: 4px;
@@ -3847,7 +3789,7 @@ a.status-card {
 
   .figure {
     background: darken($ui-base-color, 8%);
-    color: $ui-secondary-color;
+    color: $darker-text-color;
     margin-bottom: 20px;
     border-radius: 4px;
     padding: 10px;
@@ -3936,7 +3878,7 @@ a.status-card {
 .actions-modal,
 .mute-modal {
   background: lighten($ui-secondary-color, 8%);
-  color: $ui-base-color;
+  color: $inverted-text-color;
   border-radius: 8px;
   overflow: hidden;
   max-width: 90vw;
@@ -3994,7 +3936,7 @@ a.status-card {
   & > div {
     flex: 1 1 auto;
     text-align: right;
-    color: lighten($ui-base-color, 33%);
+    color: $lighter-text-color;
     padding-right: 10px;
   }
 
@@ -4081,7 +4023,7 @@ a.status-card {
     box-sizing: border-box;
     width: 100%;
     margin: 0;
-    color: $ui-base-color;
+    color: $inverted-text-color;
     background: $white;
     padding: 10px;
     font-family: inherit;
@@ -4103,7 +4045,7 @@ a.status-card {
     margin-bottom: 24px;
 
     &__label {
-      color: $ui-base-color;
+      color: $inverted-text-color;
       font-size: 14px;
     }
   }
@@ -4142,7 +4084,7 @@ a.status-card {
 
     li:not(:empty) {
       a {
-        color: $ui-base-color;
+        color: $inverted-text-color;
         display: flex;
         padding: 12px 16px;
         font-size: 15px;
@@ -4178,14 +4120,14 @@ a.status-card {
   .confirmation-modal__cancel-button,
   .mute-modal__cancel-button {
     background-color: transparent;
-    color: darken($ui-secondary-color, 34%);
+    color: $lighter-text-color;
     font-size: 14px;
     font-weight: 500;
 
     &:hover,
     &:focus,
     &:active {
-      color: darken($ui-secondary-color, 38%);
+      color: transparentize($lighter-text-color, 0.04);
     }
   }
 }
@@ -4218,7 +4160,7 @@ a.status-card {
 }
 
 .loading-bar {
-  background-color: $ui-highlight-color;
+  background-color: $highlight-text-color;
   height: 3px;
   position: absolute;
   top: 0;
@@ -4266,7 +4208,7 @@ a.status-card {
 
   &__icon {
     flex: 0 0 auto;
-    color: $ui-base-lighter-color;
+    color: $darker-text-color;
     padding: 8px 18px;
     cursor: default;
     border-right: 1px solid lighten($ui-base-color, 8%);
@@ -4296,7 +4238,7 @@ a.status-card {
 
     a {
       text-decoration: none;
-      color: $ui-base-lighter-color;
+      color: $darker-text-color;
       font-weight: 500;
 
       &:hover {
@@ -4315,7 +4257,7 @@ a.status-card {
     }
 
     .fa {
-      color: $ui-base-lighter-color;
+      color: $darker-text-color;
     }
   }
 }
@@ -4511,7 +4453,7 @@ a.status-card {
     z-index: 4;
     border: 0;
     background: $base-shadow-color;
-    color: $ui-primary-color;
+    color: $darker-text-color;
     transition: none;
     pointer-events: none;
 
@@ -4522,7 +4464,7 @@ a.status-card {
       &:hover,
       &:active,
       &:focus {
-        color: lighten($ui-primary-color, 8%);
+        color: transparentize($darker-text-color, 0.07);
       }
     }
 
@@ -4719,7 +4661,7 @@ a.status-card {
     background-size: cover;
     background-position: center;
     position: absolute;
-    color: $ui-primary-color;
+    color: $darker-text-color;
     text-decoration: none;
     border-radius: 4px;
 
@@ -4727,7 +4669,7 @@ a.status-card {
     &:active,
     &:focus {
       outline: 0;
-      color: $ui-secondary-color;
+      color: transparentize($darker-text-color, 0.07);
 
       &::before {
         content: "";
@@ -4758,7 +4700,7 @@ a.status-card {
   a {
     display: block;
     flex: 1 1 auto;
-    color: $ui-primary-color;
+    color: $darker-text-color;
     padding: 15px 0;
     font-size: 14px;
     font-weight: 500;
@@ -4767,7 +4709,7 @@ a.status-card {
     position: relative;
 
     &.active {
-      color: $ui-secondary-color;
+      color: transparentize($darker-text-color, 0.07);
 
       &::before,
       &::after {
@@ -4802,12 +4744,12 @@ a.status-card {
   padding: 10px 14px;
   padding-bottom: 14px;
   margin-top: 10px;
-  color: $ui-primary-color;
+  color: $lighter-text-color;
   box-shadow: 2px 4px 15px rgba($base-shadow-color, 0.4);
 
   h4 {
     text-transform: uppercase;
-    color: $ui-primary-color;
+    color: $lighter-text-color;
     font-size: 13px;
     font-weight: 500;
     margin-bottom: 10px;
@@ -4823,7 +4765,7 @@ a.status-card {
 
   em {
     font-weight: 500;
-    color: $ui-base-color;
+    color: $inverted-text-color;
   }
 }
 
@@ -4839,11 +4781,11 @@ noscript {
   div {
     font-size: 14px;
     margin: 30px auto;
-    color: $ui-secondary-color;
+    color: $primary-text-color;
     max-width: 400px;
 
     a {
-      color: $ui-highlight-color;
+      color: $highlight-text-color;
       text-decoration: underline;
 
       &:hover {
@@ -4941,7 +4883,6 @@ noscript {
     }
 
     .embed-modal__html {
-      color: $ui-secondary-color;
       outline: 0;
       box-sizing: border-box;
       display: block;
@@ -4950,7 +4891,7 @@ noscript {
       padding: 10px;
       font-family: 'mastodon-font-monospace', monospace;
       background: $ui-base-color;
-      color: $ui-primary-color;
+      color: $primary-text-color;
       font-size: 14px;
       margin: 0;
       margin-bottom: 15px;
@@ -4993,7 +4934,7 @@ noscript {
   &__message {
     position: relative;
     margin-left: 58px;
-    color: $ui-base-lighter-color;
+    color: $darker-text-color;
     padding: 8px 0;
     padding-top: 0;
     padding-bottom: 4px;
@@ -5201,7 +5142,7 @@ noscript {
   }
 
   th {
-    color: $ui-primary-color;
+    color: $darker-text-color;
     background: darken($ui-base-color, 4%);
     max-width: 120px;
     font-weight: 500;
diff --git a/app/javascript/styles/mastodon/containers.scss b/app/javascript/styles/mastodon/containers.scss
index e761f58eb2..8df2902d23 100644
--- a/app/javascript/styles/mastodon/containers.scss
+++ b/app/javascript/styles/mastodon/containers.scss
@@ -100,7 +100,7 @@
 
   .name {
     flex: 1 1 auto;
-    color: $ui-secondary-color;
+    color: $darker-text-color;
     width: calc(100% - 88px);
 
     .username {
diff --git a/app/javascript/styles/mastodon/emoji_picker.scss b/app/javascript/styles/mastodon/emoji_picker.scss
index 4161cc0456..3620a6f54d 100644
--- a/app/javascript/styles/mastodon/emoji_picker.scss
+++ b/app/javascript/styles/mastodon/emoji_picker.scss
@@ -7,7 +7,7 @@
 
   font-size: 13px;
   display: inline-block;
-  color: $ui-base-color;
+  color: $inverted-text-color;
 
   .emoji-mart-emoji {
     padding: 6px;
@@ -36,7 +36,7 @@
   display: flex;
   justify-content: space-between;
   padding: 0 6px;
-  color: $ui-primary-color;
+  color: $lighter-text-color;
   line-height: 0;
 }
 
@@ -50,15 +50,15 @@
   cursor: pointer;
 
   &:hover {
-    color: darken($ui-primary-color, 4%);
+    color: opacify($lighter-text-color, 0.04);
   }
 }
 
 .emoji-mart-anchor-selected {
-  color: darken($ui-highlight-color, 3%);
+  color: $highlight-text-color;
 
   &:hover {
-    color: darken($ui-highlight-color, 3%);
+    color: darken($highlight-text-color, 4%);
   }
 
   .emoji-mart-anchor-bar {
@@ -72,7 +72,7 @@
   left: 0;
   width: 100%;
   height: 3px;
-  background-color: darken($ui-highlight-color, 3%);
+  background-color: $highlight-text-color;
 }
 
 .emoji-mart-anchors {
@@ -115,7 +115,7 @@
     display: block;
     width: 100%;
     background: rgba($ui-secondary-color, 0.3);
-    color: $ui-primary-color;
+    color: $inverted-text-color;
     border: 1px solid $ui-secondary-color;
     border-radius: 4px;
 
@@ -184,7 +184,7 @@
   font-size: 14px;
   text-align: center;
   padding-top: 70px;
-  color: $ui-primary-color;
+  color: $lighter-text-color;
 
   .emoji-mart-category-label {
     display: none;
diff --git a/app/javascript/styles/mastodon/footer.scss b/app/javascript/styles/mastodon/footer.scss
index 2d953b34e7..ba2a06954e 100644
--- a/app/javascript/styles/mastodon/footer.scss
+++ b/app/javascript/styles/mastodon/footer.scss
@@ -2,7 +2,7 @@
   text-align: center;
   margin-top: 30px;
   font-size: 12px;
-  color: darken($ui-secondary-color, 25%);
+  color: $darker-text-color;
 
   .domain {
     font-weight: 500;
diff --git a/app/javascript/styles/mastodon/forms.scss b/app/javascript/styles/mastodon/forms.scss
index 945579a9cb..3a3b4c3269 100644
--- a/app/javascript/styles/mastodon/forms.scss
+++ b/app/javascript/styles/mastodon/forms.scss
@@ -29,14 +29,14 @@ code {
 
   span.hint {
     display: block;
-    color: $ui-primary-color;
+    color: $darker-text-color;
     font-size: 12px;
     margin-top: 4px;
   }
 
   p.hint {
     margin-bottom: 15px;
-    color: $ui-primary-color;
+    color: $darker-text-color;
 
     &.subtle-hint {
       text-align: center;
@@ -44,10 +44,10 @@ code {
       line-height: 18px;
       margin-top: 15px;
       margin-bottom: 0;
-      color: $ui-primary-color;
+      color: $darker-text-color;
 
       a {
-        color: $ui-highlight-color;
+        color: $highlight-text-color;
       }
     }
   }
@@ -244,35 +244,35 @@ code {
     }
 
     &:focus:invalid {
-      border-bottom-color: $error-value-color;
+      border-bottom-color: lighten($error-red, 12%);
     }
 
     &:required:valid {
-      border-bottom-color: $valid-value-color;
+      border-bottom-color: lighten($error-red, 12%);
     }
 
     &:active,
     &:focus {
-      border-bottom-color: $ui-highlight-color;
+      border-bottom-color: $highlight-text-color;
       background: rgba($base-overlay-background, 0.1);
     }
   }
 
   .input.field_with_errors {
     label {
-      color: $error-value-color;
+      color: lighten($error-red, 12%);
     }
 
     input[type=text],
     input[type=email],
     input[type=password] {
-      border-bottom-color: $error-value-color;
+      border-bottom-color: lighten($error-red, 12%);
     }
 
     .error {
       display: block;
       font-weight: 500;
-      color: $error-value-color;
+      color: lighten($error-red, 12%);
       margin-top: 4px;
     }
   }
@@ -356,7 +356,7 @@ code {
       padding: 7px 4px;
       padding-bottom: 9px;
       font-size: 16px;
-      color: $ui-base-lighter-color;
+      color: $darker-text-color;
       font-family: inherit;
       pointer-events: none;
       cursor: default;
@@ -366,7 +366,7 @@ code {
 
 .flash-message {
   background: lighten($ui-base-color, 8%);
-  color: $ui-primary-color;
+  color: $darker-text-color;
   border-radius: 4px;
   padding: 15px 10px;
   margin-bottom: 30px;
@@ -378,7 +378,6 @@ code {
   }
 
   .oauth-code {
-    color: $ui-secondary-color;
     outline: 0;
     box-sizing: border-box;
     display: block;
@@ -387,7 +386,7 @@ code {
     padding: 10px;
     font-family: 'mastodon-font-monospace', monospace;
     background: $ui-base-color;
-    color: $ui-primary-color;
+    color: $primary-text-color;
     font-size: 14px;
     margin: 0;
 
@@ -426,7 +425,7 @@ code {
   text-align: center;
 
   a {
-    color: $ui-primary-color;
+    color: $darker-text-color;
     text-decoration: none;
 
     &:hover {
@@ -439,7 +438,7 @@ code {
 .follow-prompt {
   margin-bottom: 30px;
   text-align: center;
-  color: $ui-primary-color;
+  color: $darker-text-color;
 
   h2 {
     font-size: 16px;
@@ -447,7 +446,7 @@ code {
   }
 
   strong {
-    color: $ui-secondary-color;
+    color: $primary-text-color;
     font-weight: 500;
 
     @each $lang in $cjk-langs {
@@ -484,7 +483,7 @@ code {
 
 .qr-alternative {
   margin-bottom: 20px;
-  color: $ui-secondary-color;
+  color: $darker-text-color;
   flex: 150px;
 
   samp {
@@ -569,7 +568,7 @@ code {
 
 .post-follow-actions {
   text-align: center;
-  color: $ui-primary-color;
+  color: $darker-text-color;
 
   div {
     margin-bottom: 4px;
@@ -582,7 +581,7 @@ code {
 
   h4 {
     font-size: 16px;
-    color: $ui-base-lighter-color;
+    color: $primary-text-color;
     text-align: center;
     margin-bottom: 20px;
     border: 0;
diff --git a/app/javascript/styles/mastodon/landing_strip.scss b/app/javascript/styles/mastodon/landing_strip.scss
index ffa1e149da..651c06ced7 100644
--- a/app/javascript/styles/mastodon/landing_strip.scss
+++ b/app/javascript/styles/mastodon/landing_strip.scss
@@ -1,7 +1,7 @@
 .landing-strip,
 .memoriam-strip {
   background: rgba(darken($ui-base-color, 7%), 0.8);
-  color: $ui-primary-color;
+  color: $darker-text-color;
   font-weight: 400;
   padding: 14px;
   border-radius: 4px;
@@ -45,7 +45,7 @@
   padding: 14px;
   border-radius: 4px;
   background: rgba(darken($ui-base-color, 7%), 0.8);
-  color: $ui-secondary-color;
+  color: $darker-text-color;
   font-weight: 400;
   margin-bottom: 20px;
 
@@ -88,7 +88,7 @@
 
     .fa {
       margin-right: 5px;
-      color: $ui-primary-color;
+      color: $darker-text-color;
     }
   }
 
@@ -103,7 +103,7 @@
       text-decoration: none;
 
       span {
-        color: $ui-highlight-color;
+        color: $highlight-text-color;
         font-weight: 400;
       }
     }
diff --git a/app/javascript/styles/mastodon/stream_entries.scss b/app/javascript/styles/mastodon/stream_entries.scss
index dfdc48d061..c39163ba8d 100644
--- a/app/javascript/styles/mastodon/stream_entries.scss
+++ b/app/javascript/styles/mastodon/stream_entries.scss
@@ -84,7 +84,7 @@
         font-size: 14px;
 
         .status__relative-time {
-          color: $ui-primary-color;
+          color: $lighter-text-color;
         }
       }
     }
@@ -93,7 +93,7 @@
       display: block;
       max-width: 100%;
       padding-right: 25px;
-      color: $ui-base-color;
+      color: $lighter-text-color;
     }
 
     .status__avatar {
@@ -123,7 +123,7 @@
 
       strong {
         font-weight: 500;
-        color: $ui-base-color;
+        color: $inverted-text-color;
 
         @each $lang in $cjk-langs {
           &:lang(#{$lang}) {
@@ -134,15 +134,15 @@
 
       span {
         font-size: 14px;
-        color: $ui-primary-color;
+        color: $inverted-text-color;
       }
     }
 
     .status__content {
-      color: $ui-base-color;
+      color: $inverted-text-color;
 
       a {
-        color: $ui-highlight-color;
+        color: $highlight-text-color;
       }
 
       a.status__content__spoiler-link {
@@ -180,7 +180,7 @@
 
         strong {
           font-weight: 500;
-          color: $ui-base-color;
+          color: $inverted-text-color;
 
           @each $lang in $cjk-langs {
             &:lang(#{$lang}) {
@@ -191,7 +191,7 @@
 
         span {
           font-size: 14px;
-          color: $ui-primary-color;
+          color: $lighter-text-color;
         }
       }
     }
@@ -207,10 +207,10 @@
     }
 
     .status__content {
-      color: $ui-base-color;
+      color: $inverted-text-color;
 
       a {
-        color: $ui-highlight-color;
+        color: $highlight-text-color;
       }
 
       a.status__content__spoiler-link {
@@ -225,7 +225,7 @@
 
     .detailed-status__meta {
       margin-top: 15px;
-      color: $ui-primary-color;
+      color: $lighter-text-color;
       font-size: 14px;
       line-height: 18px;
 
@@ -243,7 +243,7 @@
 
     .status-card {
       border-color: lighten($ui-secondary-color, 4%);
-      color: darken($ui-primary-color, 4%);
+      color: $lighter-text-color;
 
       &:hover {
         background: lighten($ui-secondary-color, 4%);
@@ -252,7 +252,7 @@
 
     .status-card__title,
     .status-card__description {
-      color: $ui-base-color;
+      color: $inverted-text-color;
     }
 
     .status-card__image {
@@ -262,7 +262,7 @@
 
   .media-spoiler {
     background: $ui-base-color;
-    color: $ui-primary-color;
+    color: $darker-text-color;
   }
 
   .pre-header {
@@ -270,7 +270,7 @@
     padding-left: (48px + 14px * 2);
     padding-bottom: 0;
     margin-bottom: -4px;
-    color: $ui-primary-color;
+    color: $lighter-text-color;
     font-size: 14px;
     position: relative;
 
@@ -280,7 +280,7 @@
     }
 
     .status__display-name.muted strong {
-      color: $ui-primary-color;
+      color: $lighter-text-color;
     }
   }
 
diff --git a/app/javascript/styles/mastodon/tables.scss b/app/javascript/styles/mastodon/tables.scss
index 92870e6790..c12d84f1c0 100644
--- a/app/javascript/styles/mastodon/tables.scss
+++ b/app/javascript/styles/mastodon/tables.scss
@@ -30,7 +30,7 @@
   }
 
   a {
-    color: $ui-highlight-color;
+    color: $highlight-text-color;
     text-decoration: underline;
 
     &:hover {
@@ -68,7 +68,7 @@ a.table-action-link {
   display: inline-block;
   margin-right: 5px;
   padding: 0 10px;
-  color: rgba($primary-text-color, 0.7);
+  color: $darker-text-color;
   font-weight: 500;
 
   &:hover {
diff --git a/app/javascript/styles/mastodon/variables.scss b/app/javascript/styles/mastodon/variables.scss
index e456c27ee3..dc4e72a2ea 100644
--- a/app/javascript/styles/mastodon/variables.scss
+++ b/app/javascript/styles/mastodon/variables.scss
@@ -18,6 +18,11 @@ $base-overlay-background: $black !default;
 $base-border-color: $white !default;
 $simple-background-color: $white !default;
 $primary-text-color: $white !default;
+$darker-text-color: rgba($primary-text-color, 0.7) !default;
+$highlight-text-color: $classic-highlight-color !default;
+$inverted-text-color: $black !default;
+$lighter-text-color: rgba($inverted-text-color, 0.7) !default;
+$action-button-color: #8d9ac2;
 $valid-value-color: $success-green !default;
 $error-value-color: $error-red !default;
 
@@ -26,7 +31,7 @@ $ui-base-color: $classic-base-color !default;                  // Darkest
 $ui-base-lighter-color: lighten($ui-base-color, 26%) !default; // Lighter darkest
 $ui-primary-color: $classic-primary-color !default;            // Lighter
 $ui-secondary-color: $classic-secondary-color !default;        // Lightest
-$ui-highlight-color: $classic-highlight-color !default;        // Vibrant
+$ui-highlight-color: #2b5fd9;
 
 // Language codes that uses CJK fonts
 $cjk-langs: ja, ko, zh-CN, zh-HK, zh-TW;