diff --git a/app/javascript/flavours/glitch/styles/admin.scss b/app/javascript/flavours/glitch/styles/admin.scss
index a57e014e9e..7adeaeee01 100644
--- a/app/javascript/flavours/glitch/styles/admin.scss
+++ b/app/javascript/flavours/glitch/styles/admin.scss
@@ -128,7 +128,6 @@ $content-width: 840px;
         }
 
         &.selected {
-          background: darken($ui-base-color, 2%);
           border-radius: 4px 0 0;
         }
       }
@@ -146,13 +145,9 @@ $content-width: 840px;
 
       .simple-navigation-active-leaf a {
         color: $primary-text-color;
-        background-color: darken($ui-highlight-color, 2%);
+        background-color: $ui-highlight-color;
         border-bottom: 0;
         border-radius: 0;
-
-        &:hover {
-          background-color: $ui-highlight-color;
-        }
       }
     }
 
@@ -246,12 +241,6 @@ $content-width: 840px;
             font-weight: 700;
             color: $primary-text-color;
             background: $ui-highlight-color;
-
-            &:hover,
-            &:focus,
-            &:active {
-              background: lighten($ui-highlight-color, 4%);
-            }
           }
         }
       }
diff --git a/app/javascript/flavours/glitch/styles/components/misc.scss b/app/javascript/flavours/glitch/styles/components/misc.scss
index 208204021a..c8c227e0cb 100644
--- a/app/javascript/flavours/glitch/styles/components/misc.scss
+++ b/app/javascript/flavours/glitch/styles/components/misc.scss
@@ -38,11 +38,11 @@
 }
 
 .button {
-  background-color: darken($ui-highlight-color, 3%);
+  background-color: $ui-button-background-color;
   border: 10px none;
   border-radius: 4px;
   box-sizing: border-box;
-  color: $primary-text-color;
+  color: $ui-button-color;
   cursor: pointer;
   display: inline-block;
   font-family: inherit;
@@ -62,14 +62,14 @@
   &:active,
   &:focus,
   &:hover {
-    background-color: $ui-highlight-color;
+    background-color: $ui-button-focus-background-color;
   }
 
   &--destructive {
     &:active,
     &:focus,
     &:hover {
-      background-color: $error-red;
+      background-color: $ui-button-destructive-focus-background-color;
       transition: none;
     }
   }
@@ -79,43 +79,22 @@
     cursor: default;
   }
 
-  &.button-alternative {
-    color: $inverted-text-color;
-    background: $ui-primary-color;
-
-    &:active,
-    &:focus,
-    &:hover {
-      background-color: lighten($ui-primary-color, 4%);
-    }
-  }
-
-  &.button-alternative-2 {
-    background: $ui-base-lighter-color;
-
-    &:active,
-    &:focus,
-    &:hover {
-      background-color: lighten($ui-base-lighter-color, 4%);
-    }
-  }
-
   &.button-secondary {
     font-size: 16px;
     line-height: 36px;
     height: auto;
-    color: $darker-text-color;
+    color: $ui-button-secondary-color;
     text-transform: none;
     background: transparent;
     padding: 6px 17px;
-    border: 1px solid lighten($ui-base-color, 12%);
+    border: 1px solid $ui-button-secondary-border-color;
 
     &:active,
     &:focus,
     &:hover {
-      background: lighten($ui-base-color, 4%);
-      border-color: lighten($ui-base-color, 16%);
-      color: lighten($darker-text-color, 4%);
+      border-color: $ui-button-secondary-focus-background-color;
+      color: $ui-button-secondary-focus-color;
+      background-color: $ui-button-secondary-focus-background-color;
       text-decoration: none;
     }
 
@@ -127,14 +106,14 @@
   &.button-tertiary {
     background: transparent;
     padding: 6px 17px;
-    color: $highlight-text-color;
-    border: 1px solid $highlight-text-color;
+    color: $ui-button-tertiary-color;
+    border: 1px solid $ui-button-tertiary-border-color;
 
     &:active,
     &:focus,
     &:hover {
-      background: $ui-highlight-color;
-      color: $primary-text-color;
+      background-color: $ui-button-tertiary-focus-background-color;
+      color: $ui-button-tertiary-focus-color;
       border: 0;
       padding: 7px 18px;
     }
diff --git a/app/javascript/flavours/glitch/styles/components/modal.scss b/app/javascript/flavours/glitch/styles/components/modal.scss
index c68c5fc53d..9c4149fb95 100644
--- a/app/javascript/flavours/glitch/styles/components/modal.scss
+++ b/app/javascript/flavours/glitch/styles/components/modal.scss
@@ -718,15 +718,15 @@
   }
 
   .button.button-secondary {
-    border-color: $inverted-text-color;
-    color: $inverted-text-color;
+    border-color: $ui-button-secondary-border-color;
+    color: $ui-button-secondary-color;
     flex: 0 0 auto;
 
     &:hover,
     &:focus,
     &:active {
-      border-color: lighten($inverted-text-color, 15%);
-      color: lighten($inverted-text-color, 15%);
+      border-color: $ui-button-secondary-focus-background-color;
+      color: $ui-button-secondary-focus-color;
     }
   }
 
diff --git a/app/javascript/flavours/glitch/styles/dashboard.scss b/app/javascript/flavours/glitch/styles/dashboard.scss
index bc34c6ec0a..36a7f44253 100644
--- a/app/javascript/flavours/glitch/styles/dashboard.scss
+++ b/app/javascript/flavours/glitch/styles/dashboard.scss
@@ -81,7 +81,7 @@
     display: flex;
     align-items: baseline;
     border-radius: 4px;
-    background: darken($ui-highlight-color, 2%);
+    background: $ui-button-background-color;
     color: $primary-text-color;
     transition: all 100ms ease-in;
     font-size: 14px;
@@ -94,7 +94,7 @@
     &:active,
     &:focus,
     &:hover {
-      background-color: $ui-highlight-color;
+      background-color: $ui-button-focus-background-color;
       transition: all 200ms ease-out;
     }
 
diff --git a/app/javascript/flavours/glitch/styles/forms.scss b/app/javascript/flavours/glitch/styles/forms.scss
index 81f42af145..850374f613 100644
--- a/app/javascript/flavours/glitch/styles/forms.scss
+++ b/app/javascript/flavours/glitch/styles/forms.scss
@@ -512,8 +512,8 @@ code {
     width: 100%;
     border: 0;
     border-radius: 4px;
-    background: darken($ui-highlight-color, 2%);
-    color: $primary-text-color;
+    background: $ui-button-background-color;
+    color: $ui-button-color;
     font-size: 18px;
     line-height: inherit;
     height: auto;
@@ -535,7 +535,7 @@ code {
     &:active,
     &:focus,
     &:hover {
-      background-color: $ui-highlight-color;
+      background-color: $ui-button-focus-background-color;
     }
 
     &:disabled:hover {
@@ -543,15 +543,12 @@ code {
     }
 
     &.negative {
-      background: $error-value-color;
-
-      &:hover {
-        background-color: lighten($error-value-color, 5%);
-      }
+      background: $ui-button-destructive-background-color;
 
+      &:hover,
       &:active,
       &:focus {
-        background-color: darken($error-value-color, 5%);
+        background-color: $ui-button-destructive-focus-background-color;
       }
     }
   }
diff --git a/app/javascript/flavours/glitch/styles/mastodon-light/diff.scss b/app/javascript/flavours/glitch/styles/mastodon-light/diff.scss
index cfcdd742e1..ce74e88bd9 100644
--- a/app/javascript/flavours/glitch/styles/mastodon-light/diff.scss
+++ b/app/javascript/flavours/glitch/styles/mastodon-light/diff.scss
@@ -5,19 +5,6 @@ html {
   scrollbar-color: $ui-base-color rgba($ui-base-color, 0.25);
 }
 
-// Change the colors of button texts
-.button {
-  color: $white;
-
-  &.button-alternative-2 {
-    color: $white;
-  }
-
-  &.button-tertiary {
-    color: $highlight-text-color;
-  }
-}
-
 .simple_form .button.button-tertiary {
   color: $highlight-text-color;
 }
@@ -436,26 +423,6 @@ html {
   color: $white;
 }
 
-.button.button-tertiary {
-  &:hover,
-  &:focus,
-  &:active {
-    color: $white;
-  }
-}
-
-.button.button-secondary {
-  border-color: $darker-text-color;
-  color: $darker-text-color;
-
-  &:hover,
-  &:focus,
-  &:active {
-    border-color: darken($darker-text-color, 8%);
-    color: darken($darker-text-color, 8%);
-  }
-}
-
 .flash-message.warning {
   color: lighten($gold-star, 16%);
 }
diff --git a/app/javascript/flavours/glitch/styles/mastodon-light/variables.scss b/app/javascript/flavours/glitch/styles/mastodon-light/variables.scss
index cae065878c..250e200fc6 100644
--- a/app/javascript/flavours/glitch/styles/mastodon-light/variables.scss
+++ b/app/javascript/flavours/glitch/styles/mastodon-light/variables.scss
@@ -7,6 +7,12 @@ $classic-primary-color: #9baec8;
 $classic-secondary-color: #d9e1e8;
 $classic-highlight-color: #6364ff;
 
+$blurple-600: #563acc; // Iris
+$blurple-500: #6364ff; // Brand purple
+$blurple-300: #858afa; // Faded Blue
+$grey-600: #4e4c5a; // Trout
+$grey-100: #dadaf3; // Topaz
+
 // Differences
 $success-green: lighten(#3c754d, 8%);
 
@@ -19,6 +25,13 @@ $ui-primary-color: #9bcbed;
 $ui-secondary-color: $classic-base-color !default;
 $ui-highlight-color: $classic-highlight-color !default;
 
+$ui-button-secondary-color: $grey-600 !default;
+$ui-button-secondary-border-color: $grey-600 !default;
+$ui-button-secondary-focus-color: $white !default;
+
+$ui-button-tertiary-color: $blurple-500 !default;
+$ui-button-tertiary-border-color: $blurple-500 !default;
+
 $primary-text-color: $black !default;
 $darker-text-color: $classic-base-color !default;
 $highlight-text-color: darken($ui-highlight-color, 8%) !default;
diff --git a/app/javascript/flavours/glitch/styles/variables.scss b/app/javascript/flavours/glitch/styles/variables.scss
index 8608fec723..465edff9e7 100644
--- a/app/javascript/flavours/glitch/styles/variables.scss
+++ b/app/javascript/flavours/glitch/styles/variables.scss
@@ -1,10 +1,18 @@
 // Commonly used web colors
 $black: #000000; // Black
 $white: #ffffff; // White
-$success-green: #79bd9a; // Padua
-$error-red: #df405a; // Cerise
-$warning-red: #ff5050; // Sunset Orange
-$gold-star: #ca8f04; // Dark Goldenrod
+$red-600: #b7253d !default; // Deep Carmine
+$red-500: #df405a !default; // Cerise
+$blurple-600: #563acc; // Iris
+$blurple-500: #6364ff; // Brand purple
+$blurple-300: #858afa; // Faded Blue
+$grey-600: #4e4c5a; // Trout
+$grey-100: #dadaf3; // Topaz
+
+$success-green: #79bd9a !default; // Padua
+$error-red: $red-500 !default; // Cerise
+$warning-red: #ff5050 !default; // Sunset Orange
+$gold-star: #ca8f04 !default; // Dark Goldenrod
 
 $red-bookmark: $warning-red;
 
@@ -31,6 +39,22 @@ $ui-base-lighter-color: lighten(
 $ui-primary-color: $classic-primary-color !default; // Lighter
 $ui-secondary-color: $classic-secondary-color !default; // Lightest
 $ui-highlight-color: $classic-highlight-color !default;
+$ui-button-color: $white !default;
+$ui-button-background-color: $blurple-500 !default;
+$ui-button-focus-background-color: $blurple-600 !default;
+
+$ui-button-secondary-color: $grey-100 !default;
+$ui-button-secondary-border-color: $grey-100 !default;
+$ui-button-secondary-focus-background-color: $grey-600 !default;
+$ui-button-secondary-focus-color: $white !default;
+
+$ui-button-tertiary-color: $blurple-300 !default;
+$ui-button-tertiary-border-color: $blurple-300 !default;
+$ui-button-tertiary-focus-background-color: $blurple-600 !default;
+$ui-button-tertiary-focus-color: $white !default;
+
+$ui-button-destructive-background-color: $red-500 !default;
+$ui-button-destructive-focus-background-color: $red-600 !default;
 
 // Variables for texts
 $primary-text-color: $white !default;
@@ -38,7 +62,8 @@ $darker-text-color: $ui-primary-color !default;
 $dark-text-color: $ui-base-lighter-color !default;
 $secondary-text-color: $ui-secondary-color !default;
 $highlight-text-color: lighten($ui-highlight-color, 8%) !default;
-$action-button-color: $ui-base-lighter-color !default;
+$action-button-color: $ui-base-color !default;
+$action-button-focus-color: $ui-base-color !default;
 $passive-text-color: $gold-star !default;
 $active-passive-text-color: $success-green !default;