Move all hex colors in SASS to variables and all variations to darken/lighten

app/assets/stylesheets/about.scss

@@ -1,11 +1,10 @@
 @import url(https://fonts.googleapis.com/css?family=Montserrat);
-@import url(https://fonts.googleapis.com/css?family=Judson);
 
 .about-body {
   .wrapper {
     max-width: 600px;
     margin: 0 auto;
-    color: #9baec8;
+    color: $color3;
     padding-top: 50px;
     padding-bottom: 50px;
 
@@ -18,7 +17,7 @@
     font: 46px/52px -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
     font-weight: 600;
     margin-bottom: 20px;
-    color: #2b90d9;
+    color: $color4;
     padding: 20px 0;
 
     img {
@@ -32,19 +31,19 @@
   h2 {
     font-family: 'Montserrat', sans-serif;
     font-size: 24px;
-    line-height: 28px;// 'Judson', sans-serif;
+    line-height: 28px;
     font-weight: 400;
     margin-bottom: 20px;
-    color: #fff;
+    color: $color5;
   }
 
   h3 {
     font-family: 'Montserrat', sans-serif;
     font-size: 20px;
-    line-height: 28px;// 'Judson', sans-serif;
+    line-height: 28px;
     font-weight: 400;
     margin-bottom: 20px;
-    color: #d9e1e8;
+    color: $color2;
   }
 
   ul, ol {
@@ -66,13 +65,11 @@
 
   p, li {
     font: 16px/28px 'Montserrat', sans-serif;
-    //font-size: 19px;
-    //line-height: 28px;// 'Judson', sans-serif;
     font-weight: 400;
     margin-bottom: 26px;
 
     a {
-      color: #2b90d9;
+      color: $color4;
       text-decoration: underline;
     }
   }
@@ -81,14 +78,14 @@
     display: inline-block;
     padding: 7px 7px 5px 7px;
     margin: 0 2px;
-    background: #9baec8;
-    color: #282c37;
+    background: $color3;
+    color: $color1;
     font: 16px/16px 'Montserrat', sans-serif;
     font-weight: 300;
   }
 
   .screenshot {
-    box-shadow: 0 0 15px rgba(0, 0, 0, 0.4);
+    box-shadow: 0 0 15px rgba($color8, 0.4);
     margin-bottom: 26px;
 
     img {
@@ -107,7 +104,7 @@
       line-height: 36px;
 
       a {
-        color: #9baec8;
+        color: $color3;
         text-decoration: underline;
       }
     }
@@ -124,8 +121,8 @@
   margin: 20px 0;
   display: flex;
   justify-content: space-between;
-  border-top: 1px solid lighten(#282c37, 10%);
-  border-bottom: 1px solid lighten(#282c37, 10%);
+  border-top: 1px solid lighten($color1, 10%);
+  border-bottom: 1px solid lighten($color1, 10%);
   padding-right: 14px;
 
   .section {
@@ -142,7 +139,7 @@
       font-size: 16px;
 
       &:last-child {
-        color: #d9e1e8;
+        color: $color2;
         font-size: 14px;
       }
     }
@@ -151,7 +148,7 @@
       font-weight: 500;
       font-size: 32px;
       line-height: 48px;
-      color: #fff;
+      color: $color5;
     }
   }
 }
@@ -178,7 +175,7 @@
 
     a {
       display: block;
-      color: #fff;
+      color: $color5;
       text-decoration: none;
 
       &:hover {
@@ -190,7 +187,7 @@
 
     .username {
       display: block;
-      color: #9baec8;
+      color: $color3;
     }
   }
 }
@@ -201,7 +198,7 @@
 
   strong {
     display: block;
-    color: #fff;
+    color: $color5;
   }
 }
 
@@ -218,14 +215,14 @@
   }
 
   .sidebar {
-    border-left: 1px solid lighten(#282c37, 10%);
+    border-left: 1px solid lighten($color1, 10%);
     width: 180px;
     flex: 0 0 auto;
   }
 
   .panel {
     .panel-header {
-      background: lighten(#282c37, 10%);
+      background: lighten($color1, 10%);
       padding: 7px 14px;
       text-transform: uppercase;
       font-size: 12px;
@@ -250,7 +247,7 @@
           a {
             display: block;
             padding: 7px 14px;
-            color: rgba(255, 255, 255, 0.7);
+            color: rgba($color5, 0.7);
             text-decoration: none;
             transition: all 200ms linear;
 
@@ -259,17 +256,17 @@
             }
 
             &:hover {
-              color: #fff;
-              background-color: darken(#282c37, 5%);
+              color: $color5;
+              background-color: darken($color1, 5%);
               transition: all 100ms linear;
             }
 
             &.selected {
-              color: #fff;
-              background-color: #2b90d9;
+              color: $color5;
+              background-color: $color4;
 
               &:hover {
-                background-color: lighten(#2b90d9, 5%);
+                background-color: lighten($color4, 5%);
               }
             }
           }

app/assets/stylesheets/accounts.scss

@@ -1,10 +1,10 @@
 .card {
-  background: #282c37;
+  background: $color1;
   background-size: cover;
   padding: 60px 0;
   padding-bottom: 0;
   border-radius: 4px 4px 0 0;
-  box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
+  box-shadow: 0 0 15px rgba($color8, 0.2);
   overflow: hidden;
   position: relative;
 
@@ -14,7 +14,7 @@
   }
 
   &:after {
-    background: rgba(0, 0, 0, 0.5);
+    background: rgba($color8, 0.5);
     display: block;
     content: "";
     position: absolute;
@@ -29,7 +29,7 @@
     display: block;
     font-size: 20px;
     line-height: 18px * 1.5;
-    color: #fff;
+    color: $color5;
     font-weight: 500;
     text-align: center;
     position: relative;
@@ -38,7 +38,7 @@
     small {
       display: block;
       font-size: 14px;
-      color: #2b90d9;
+      color: $color4;
       font-weight: 400;
     }
   }
@@ -81,10 +81,10 @@
 
   .counter {
     width: 80px;
-    color: #9baec8;
+    color: $color3;
     padding: 0 10px;
     margin-bottom: 10px;
-    border-right: 1px solid #9baec8;
+    border-right: 1px solid $color3;
     cursor: default;
     position: relative;
 
@@ -99,14 +99,14 @@
       bottom: -10px;
       left: 0;
       width: 100%;
-      border-bottom: 4px solid #9baec8;
+      border-bottom: 4px solid $color3;
       opacity: 0.5;
       transition: all 0.8s ease;
     }
 
     &.active {
       &:after {
-        border-bottom: 4px solid #2b90d9;
+        border-bottom: 4px solid $color4;
         opacity: 1;
       }
     }
@@ -133,7 +133,7 @@
     .counter-number {
       font-weight: 500;
       font-size: 18px;
-      color: #fff;
+      color: $color5;
     }
   }
 
@@ -142,7 +142,7 @@
     font-size: 14px;
     line-height: 18px;
     padding: 5px 10px;
-    color: #d9e1e8;
+    color: $color2;
     order: 1;
   }
 
@@ -173,7 +173,7 @@
 
   a, .current, .next_page, .previous_page, .gap {
     font-size: 14px;
-    color: #fff;
+    color: $color5;
     font-weight: 500;
     display: inline-block;
     padding: 6px 10px;
@@ -181,9 +181,9 @@
   }
 
   .current {
-    background: #fff;
+    background: $color5;
     border-radius: 100px;
-    color: #282c37;
+    color: $color1;
     cursor: default;
   }
 
@@ -193,7 +193,7 @@
 
   .previous_page, .next_page {
     text-transform: uppercase;
-    color: #d9e1e8;
+    color: $color2;
   }
 
   .previous_page {
@@ -218,7 +218,7 @@
 
   .disabled {
     cursor: default;
-    color: lighten(#282c37, 10%);
+    color: lighten($color1, 10%);
   }
 
   @media screen and (max-width: 360px) {
@@ -236,8 +236,8 @@
 
 .accounts-grid {
   clear: both;
-  box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
-  background: #fff;
+  box-shadow: 0 0 15px rgba($color8, 0.2);
+  background: $color5;
   border-radius: 0 0 4px 4px;
   padding: 20px 10px;
   padding-bottom: 10px;
@@ -252,9 +252,9 @@
     box-sizing: border-box;
     width: 335px;
     float: left;
-    border: 1px solid #d9e1e8;
+    border: 1px solid $color2;
     border-radius: 4px;
-    color: #282c37;
+    color: $color1;
     height: 160px;
     margin-bottom: 10px;
 
@@ -265,7 +265,7 @@
     .account-grid-card__header {
       overflow: hidden;
       padding: 10px;
-      border-bottom: 1px solid #d9e1e8;
+      border-bottom: 1px solid $color2;
     }
 
     .avatar {
@@ -287,7 +287,7 @@
 
       a {
         display: block;
-        color: #282c37;
+        color: $color1;
         text-decoration: none;
 
         &:hover {
@@ -304,19 +304,19 @@
     }
 
     .username {
-      color: #2b90d9;
+      color: $color4;
     }
 
     .note {
       padding: 10px;
       padding-top: 15px;
-      color: #9baec8;
+      color: $color3;
     }
   }
 }
 
 .nothing-here {
-  color: #9baec8;
+  color: $color3;
   font-size: 14px;
   font-weight: 500;
   text-align: center;
@@ -327,10 +327,10 @@
 
 .account-card {
   padding: 14px 10px;
-  background: #fff;
+  background: $color5;
   border-radius: 4px;
   text-align: left;
-  box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
+  box-shadow: 0 0 15px rgba($color8, 0.2);
 
   .detailed-status__display-name {
     display: block;
@@ -363,12 +363,12 @@
 
       strong {
         font-weight: 500;
-        color: #282c37;
+        color: $color1;
       }
 
       span {
         font-size: 14px;
-        color: #9baec8;
+        color: $color3;
       }
     }
 
@@ -383,6 +383,6 @@
 
   .account__header__content {
     font-size: 14px;
-    color: #282c37;
+    color: $color1;
   }
 }

app/assets/stylesheets/admin.scss

@@ -2,7 +2,7 @@
   width: 100%;
   height: 100%;
   position: fixed;
-  background: #1a1c23;
+  background: darken($color1, 2%);
   overflow-y: scroll;
 
   .sidebar {
@@ -10,7 +10,7 @@
     position: fixed;
     left: 0;
     height: 100%;
-    background: #282c37;
+    background: $color1;
 
     .logo {
       display: block;
@@ -25,7 +25,7 @@
       a {
         display: block;
         padding: 15px 25px;
-        color: rgba(255, 255, 255, 0.7);
+        color: rgba($color5, 0.7);
         text-decoration: none;
         transition: all 200ms linear;
 
@@ -34,17 +34,17 @@
         }
 
         &:hover {
-          color: #fff;
-          background-color: darken(#282c37, 5%);
+          color: $color5;
+          background-color: darken($color1, 5%);
           transition: all 100ms linear;
         }
 
         &.selected {
-          color: #fff;
-          background-color: #2b90d9;
+          color: $color5;
+          background-color: $color4;
 
           &:hover {
-            background-color: lighten(#2b90d9, 5%);
+            background-color: lighten($color4, 5%);
           }
         }
       }
@@ -84,21 +84,21 @@
 
     a {
       display: inline-block;
-      color: rgba(255, 255, 255, 0.7);
+      color: rgba($color5, 0.7);
       text-decoration: none;
       text-transform: uppercase;
       font-size: 12px;
       font-weight: 500;
-      border-bottom: 2px solid #282c37;
+      border-bottom: 2px solid $color1;
 
       &:hover {
-        color: #fff;
-        border-bottom: 2px solid lighten(#282c37, 5%);
+        color: $color5;
+        border-bottom: 2px solid lighten($color1, 5%);
       }
 
       &.selected {
-        color: #2b90d9;
-        border-bottom: 2px solid #2b90d9;
+        color: $color4;
+        border-bottom: 2px solid $color4;
       }
     }
   }

app/assets/stylesheets/application.scss

@@ -1,6 +1,7 @@
+@import 'variables';
 @import url(https://fonts.googleapis.com/css?family=Roboto:400,500,400italic);
 @import url(https://fonts.googleapis.com/css?family=Roboto+Mono:400,500);
-@import "font-awesome";;
+@import 'font-awesome';;
 
 /* http://meyerweb.com/eric/tools/css/reset/
    v2.0 | 20110126
@@ -63,31 +64,31 @@ table {
 }
 
 ::-webkit-scrollbar-thumb {
-  background: #42495b;
-  border: 0px none #ffffff;
+  background: lighten($color1, 4%);
+  border: 0px none $color5;
   border-radius: 50px;
 }
 
 ::-webkit-scrollbar-thumb:hover {
-  background: #525a70;
+  background: lighten($color1, 6%);
 }
 
 ::-webkit-scrollbar-thumb:active {
-  background: #42495b;
+  background: lighten($color1, 4%);
 }
 
 ::-webkit-scrollbar-track {
-  border: 0px none #ffffff;
+  border: 0px none $color5;
   border-radius: 0;
   background: rgba(0, 0, 0, 0.1);
 }
 
 ::-webkit-scrollbar-track:hover {
-  background: #282c37;
+  background: $color1;
 }
 
 ::-webkit-scrollbar-track:active {
-  background: #282c37;
+  background: $color1;
 }
 
 ::-webkit-scrollbar-corner {
@@ -96,13 +97,13 @@ table {
 
 body {
   font-family: 'Roboto', sans-serif;
-  background: #282c37 image-url('background-photo.jpeg');
+  background: $color1 image-url('background-photo.jpeg');
   background-size: cover;
   background-attachment: fixed;
   font-size: 13px;
   line-height: 18px;
   font-weight: 400;
-  color: #fff;
+  color: $color5;
   padding-bottom: 140px;
   text-rendering: optimizelegibility;
   font-feature-settings: "kern";
@@ -164,7 +165,7 @@ body {
   h1 {
     display: block;
     text-align: center;
-    color: #fff;
+    color: $color5;
     font-size: 48px;
     font-weight: 500;
 
@@ -215,12 +216,10 @@ body {
   text-align: center;
   margin-top: 30px;
   font-size: 12px;
-  color: darken(#d9e1e8, 25%);
+  color: darken($color2, 25%);
 
   .domain {
-    //font-size: 12px;
     font-weight: 500;
-    //font-family: 'Roboto Mono', monospace;
 
     a {
       color: inherit;

app/assets/stylesheets/components.scss

@@ -1,12 +1,12 @@
 .button {
-  background-color: #2b90d9;
+  background-color: $color4;
   font-family: inherit;
   display: inline-block;
   position: relative;
   box-sizing: border-box;
   text-align: center;
   border: 10px none;
-  color: #fff;
+  color: $color5;
   font-size: 14px;
   font-weight: 500;
   letter-spacing: 0;
@@ -19,56 +19,56 @@
   text-decoration: none;
 
   &:hover {
-    background-color: #489fde;
+    background-color: lighten($color4, 7%);
   }
 
   &:disabled {
-    background-color: #9baec8;
+    background-color: $color3;
     cursor: default;
   }
 
   &.button-secondary {
-    background-color: #282c37;
+    background-color: $color1;
 
     &:hover {
-      background-color: #282c37;
+      background-color: $color1;
     }
 
     &:disabled {
-      background-color: #9baec8;
+      background-color: $color3;
     }
   }
 }
 
 .icon-button {
-  color: #616b86;
+  color: lighten($color1, 26%);
   border: none;
   background: transparent;
   cursor: pointer;
 
   &:hover {
-    color: #717b98;
+    color: lighten($color1, 33%);
   }
 
   &.disabled {
-    color: #454b5e;
+    color: lighten($color1, 13%);
     cursor: default;
   }
 
   &.active {
-    color: #2b90d9;
+    color: $color4;
   }
 }
 
 .lightbox .icon-button {
-  color: #282c37;
+  color: $color1;
 }
 
 .compose-form__textarea, .follow-form__input {
-  background: #fff;
+  background: $color5;
 
   &:disabled {
-    background: #d9e1e8;
+    background: $color2;
   }
 }
 
@@ -107,7 +107,7 @@
   }
 
   a {
-    color: #d9e1e8;
+    color: $color2;
     text-decoration: none;
 
     &:hover {
@@ -139,11 +139,11 @@
 }
 
 .reply-indicator__content {
-  color: #282c37;
+  color: $color1;
   font-size: 14px;
 
   a {
-    color: #535b72;
+    color: lighten($color1, 20%);
   }
 }
 
@@ -189,7 +189,7 @@
 
 .status__display-name, .account__display-name {
   strong {
-    color: #fff;
+    color: $color5;
   }
 
   &.muted {
@@ -214,7 +214,7 @@
 }
 
 .detailed-status__display-name {
-  color: #d9e1e8;
+  color: $color2;
   line-height: 24px;
 
   strong, span {
@@ -223,17 +223,17 @@
 
   strong {
     font-size: 16px;
-    color: #fff;
+    color: $color5;
   }
 }
 
 .muted {
   .status__content p, .status__content a {
-    color: #616b86;
+    color: lighten($color1, 26%);
   }
 
   .status__display-name strong {
-    color: #616b86;
+    color: lighten($color1, 26%);
   }
 
   .status__avatar {
@@ -246,7 +246,7 @@
   text-decoration: none;
 
   &:hover {
-    color: #fff;
+    color: $color5;
     text-decoration: underline;
   }
 }
@@ -282,17 +282,17 @@
     height: 0;
     border-style: solid;
     border-width: 0 4.5px 7.8px 4.5px;
-    border-color: transparent transparent #d9e1e8 transparent;
+    border-color: transparent transparent $color2 transparent;
     top: -7px;
     left: 8px;
   }
 
   ul {
     list-style: none;
-    background: #d9e1e8;
+    background: $color2;
     padding: 4px 0;
     border-radius: 4px;
-    box-shadow: 0 0 15px rgba(0, 0, 0, 0.4);
+    box-shadow: 0 0 15px rgba($color8, 0.4);
     min-width: 100px;
   }
 
@@ -302,12 +302,12 @@
     padding: 6px 16px;
     width: 100px;
     text-decoration: none;
-    background: #d9e1e8;
-    color: #282c37;
+    background: $color2;
+    color: $color1;
 
     &:hover {
-      background: #2b90d9;
-      color: #d9e1e8;
+      background: $color4;
+      color: $color2;
     }
   }
 }
@@ -315,7 +315,7 @@
 .static-content {
   padding: 10px;
   padding-top: 20px;
-  color: #616b86;
+  color: lighten($color1, 26%);
 
   h1 {
     font-size: 16px;
@@ -350,13 +350,13 @@
 }
 
 .drawer__inner {
-  background: linear-gradient(rgba(69, 75, 94, 1), rgba(69, 75, 94, 0.65));
+  background: linear-gradient(rgba(lighten($color1, 13%), 1), rgba(lighten($color1, 13%), 0.65));
 }
 
 .drawer__header {
   flex: 0 0 auto;
   font-size: 16px;
-  background: darken(#454b5e, 5%);
+  background: lighten($color1, 8%);
   margin-bottom: 10px;
   display: flex;
   flex-direction: row;
@@ -365,7 +365,7 @@
     transition: all 100ms ease-in;
 
     &:hover {
-      background: darken(#454b5e, 10%);
+      background: lighten($color1, 3%);
       transition: all 200ms ease-out;
     }
   }
@@ -424,22 +424,22 @@
   top: 100%;
   width: 100%;
   z-index: 99;
-  box-shadow: 0 0 15px rgba(0, 0, 0, 0.4);
+  box-shadow: 0 0 15px rgba($color8, 0.4);
 }
 
 .react-autosuggest__section-title {
-  background: #9baec8;
+  background: $color3;
   padding: 4px 10px;
   font-weight: 500;
   cursor: default;
-  color: #282c37;
+  color: $color1;
   text-transform: uppercase;
   font-size: 11px;
 }
 
 .react-autosuggest__suggestions-list {
-  background: #d9e1e8;
-  color: #282c37;
+  background: $color2;
+  color: $color1;
   font-size: 14px;
 }
 
@@ -449,8 +449,8 @@
 }
 
 .react-autosuggest__suggestion--focused {
-  background: #2b90d9;
-  color: #fff;
+  background: $color4;
+  color: $color5;
 }
 
 .scrollable {
@@ -478,7 +478,7 @@
   border: 0;
   padding: 0;
   user-select: none;
-  -webkit-tap-highlight-color: rgba(0,0,0,0);
+  -webkit-tap-highlight-color: rgba($color8, 0);
   -webkit-tap-highlight-color: transparent;
 }
 
@@ -504,20 +504,20 @@
   height: 24px;
   padding: 0;
   border-radius: 30px;
-  background-color: #282c37;
+  background-color: $color1;
   transition: all 0.2s ease;
 }
 
 .react-toggle:hover:not(.react-toggle--disabled) .react-toggle-track {
-  background-color: darken(#282c37, 10%);
+  background-color: darken($color1, 10%);
 }
 
 .react-toggle--checked .react-toggle-track {
-  background-color: #2b90d9;
+  background-color: $color4;
 }
 
 .react-toggle--checked:hover:not(.react-toggle--disabled) .react-toggle-track {
-  background-color: lighten(#2b90d9, 10%);
+  background-color: lighten($color4, 10%);
 }
 
 .react-toggle-track-check {
@@ -564,23 +564,23 @@
   left: 1px;
   width: 22px;
   height: 22px;
-  border: 1px solid #282c37;
+  border: 1px solid $color1;
   border-radius: 50%;
-  background-color: #FAFAFA;
+  background-color: darken($color5, 2%);
   box-sizing: border-box;
   transition: all 0.25s ease;
 }
 
 .react-toggle--checked .react-toggle-thumb {
   left: 27px;
-  border-color: #2b90d9;
+  border-color: $color4;
 }
 
 .column-link {
-  background: #373b4a;
+  background: lighten($color1, 6%);
 
   &:hover {
-    background: lighten(#373b4a, 5%);
+    background: lighten($color1, 11%);
   }
 }
 
@@ -594,7 +594,7 @@
   width: 100%;
   height: 100px;
   resize: none;
-  color: #282c37;
+  color: $color1;
   padding: 7px;
   font-family: inherit;
   font-size: 14px;
@@ -605,7 +605,7 @@
   transition: border-color 0.3s ease;
 
   &.file-drop {
-    border-color: #aaa;
+    border-color: darken($color5, 33%);
   }
 }
 
@@ -614,9 +614,9 @@
   top: 100%;
   width: 100%;
   z-index: 99;
-  box-shadow: 0 0 15px rgba(0, 0, 0, 0.4);
-  background: #d9e1e8;
-  color: #282c37;
+  box-shadow: 0 0 15px rgba($color8, 0.4);
+  background: $color2;
+  color: $color1;
   font-size: 14px;
 }
 
@@ -625,12 +625,12 @@
   cursor: pointer;
 
   &:hover {
-    background: darken(#d9e1e8, 10%);
+    background: darken($color2, 10%);
   }
 
   &.selected {
-    background: #2b90d9;
-    color: #fff;
+    background: $color4;
+    color: $color5;
   }
 }
 
@@ -652,14 +652,14 @@
 }
 
 .setting-text {
-  color: #9baec8;
+  color: $color3;
   background: transparent;
   border: none;
-  border-bottom: 2px solid #9baec8;
+  border-bottom: 2px solid $color3;
 
   &:focus, &:active {
-    color: #fff;
-    border-bottom-color: #2b90d9;
+    color: $color5;
+    border-bottom-color: $color4;
   }
 }
 
@@ -683,6 +683,6 @@ button.active i.fa-retweet {
 
 .status-card {
   &:hover {
-    background: #363c4b;
+    background: lighten($color1, 6%);
   }
 }

app/assets/stylesheets/forms.scss

@@ -16,7 +16,7 @@ code {
 
   .hint {
     display: block;
-    color: rgba(255, 255, 255, 0.8);
+    color: rgba($color5, 0.8);
     font-size: 12px;
   }
 
@@ -28,7 +28,7 @@ code {
     label {
       font-family: inherit;
       font-size: 16px;
-      color: #fff;
+      color: $color5;
       width: 100px;
       display: block;
       flex: 0 0 auto;
@@ -75,11 +75,11 @@ code {
     background: transparent;
     box-sizing: border-box;
     border: 0;
-    border-bottom: 2px solid #9baec8;
+    border-bottom: 2px solid $color3;
     border-radius: 2px 2px 0 0;
     padding: 7px 4px;
     font-size: 16px;
-    color: #fff;
+    color: $color5;
     display: block;
     width: 100%;
     outline: 0;
@@ -90,27 +90,27 @@ code {
     }
 
     &:focus:invalid {
-      border-bottom-color: #df405a;
+      border-bottom-color: $color6;
     }
 
     &:required:valid {
-      border-bottom-color: #79bd9a;
+      border-bottom-color: $color7;
     }
 
     &:active, &:focus {
-      border-bottom-color: #2b90d9;
-      background: rgba(0, 0, 0, 0.1);
+      border-bottom-color: $color4;
+      background: rgba($color8, 0.1);
     }
   }
 
   .input.field_with_errors {
     input[type=text], input[type=email], input[type=password] {
-      border-bottom-color: #df405a;
+      border-bottom-color: $color6;
     }
 
     .error {
       font-weight: 500;
-      color: #df405a;
+      color: $color6;
     }
   }
 
@@ -123,8 +123,8 @@ code {
     width: 100%;
     border: 0;
     border-radius: 4px;
-    background: #2b90d9;
-    color: #fff;
+    background: $color4;
+    color: $color5;
     font-size: 18px;
     padding: 10px;
     text-transform: uppercase;
@@ -134,36 +134,36 @@ code {
     margin-bottom: 10px;
 
     &:hover {
-      background-color: lighten(#2b90d9, 5%);
+      background-color: lighten($color4, 5%);
     }
 
     &:active, &:focus {
       position: relative;
       top: 1px;
-      background-color: darken(#2b90d9, 5%);
+      background-color: darken($color4, 5%);
     }
 
     &.negative {
-      background: #df405a;
+      background: $color6;
 
       &:hover {
-        background-color: lighten(#df405a, 5%);
+        background-color: lighten($color6, 5%);
       }
 
       &:active, &:focus {
-        background-color: darken(#df405a, 5%);
+        background-color: darken($color6, 5%);
       }
     }
   }
 }
 
 .flash-message {
-  background: #282c37;
-  color: #9baec8;
+  background: $color1;
+  color: $color3;
   border-radius: 4px;
   padding: 15px 10px;
   margin-bottom: 30px;
-  box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
+  box-shadow: 0 0 5px rgba($color8, 0.2);
   text-align: center;
 
   strong {
@@ -188,7 +188,7 @@ code {
 .oauth-prompt, .follow-prompt {
   margin-bottom: 30px;
   text-align: center;
-  color: #9baec8;
+  color: $color3;
 
   h2 {
     font-size: 16px;
@@ -196,7 +196,7 @@ code {
   }
 
   strong {
-    color: #d9e1e8;
+    color: $color2;
     font-weight: 500;
   }
 }

app/assets/stylesheets/stream_entries.scss

@@ -1,12 +1,12 @@
 .activity-stream {
   clear: both;
-  box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
+  box-shadow: 0 0 15px rgba($color8, 0.2);
 
   .entry {
-    background: lighten(#d9e1e8, 8%);
+    background: lighten($color2, 8%);
 
     &, .detailed-status.light {
-      border-bottom: 1px solid #d9e1e8;
+      border-bottom: 1px solid $color2;
     }
 
     &:last-child {
@@ -43,7 +43,7 @@
         font-size: 14px;
 
         .status__relative-time {
-          color: #9baec8;
+          color: $color3;
         }
       }
     }
@@ -52,7 +52,7 @@
       display: block;
       max-width: 100%;
       padding-right: 25px;
-      color: #282c37;
+      color: $color1;
     }
 
     .status__avatar {
@@ -82,20 +82,20 @@
 
       strong {
         font-weight: 500;
-        color: #282c37;
+        color: $color1;
       }
 
       span {
         font-size: 14px;
-        color: #9baec8;
+        color: $color3;
       }
     }
 
     .status__content {
-      color: #282c37;
+      color: $color1;
 
       a {
-        color: #2b90d9;
+        color: $color4;
       }
     }
 
@@ -111,7 +111,7 @@
 
   .detailed-status.light {
     padding: 14px;
-    background: #fff;
+    background: $color5;
     cursor: default;
 
     .detailed-status__display-name {
@@ -133,12 +133,12 @@
 
         strong {
           font-weight: 500;
-          color: #282c37;
+          color: $color1;
         }
 
         span {
           font-size: 14px;
-          color: #9baec8;
+          color: $color3;
         }
       }
     }
@@ -154,16 +154,16 @@
     }
 
     .status__content {
-      color: #282c37;
+      color: $color1;
 
       a {
-        color: #2b90d9;
+        color: $color4;
       }
     }
 
     .detailed-status__meta {
       margin-top: 15px;
-      color: #9baec8;
+      color: $color3;
       font-size: 14px;
       line-height: 18px;
 
@@ -248,12 +248,12 @@
       transform: translate(-50%, -50%);
       padding: 5px;
       border-radius: 100px;
-      color: rgba(255, 255, 255, 0.8);
+      color: rgba($color5, 0.8);
     }
   }
 
   .media-spoiler {
-    background: #9baec8;
+    background: $color3;
     width: 100%;
     height: 100%;
     cursor: pointer;
@@ -265,7 +265,7 @@
     transition: all 100ms linear;
 
     &:hover {
-      background: darken(#9baec8, 5%);
+      background: darken($color3, 5%);
     }
 
     span {
@@ -287,7 +287,7 @@
     padding-left: (48px + 14px*2);
     padding-bottom: 0;
     margin-bottom: -4px;
-    color: #9baec8;
+    color: $color3;
     font-size: 14px;
     position: relative;
 
@@ -297,7 +297,7 @@
     }
 
     .status__display-name.muted strong {
-      color: #9baec8;
+      color: $color3;
     }
   }
 }

app/assets/stylesheets/tables.scss

@@ -9,13 +9,13 @@
     padding: 8px;
     line-height: 18px;
     vertical-align: top;
-    border-top: 1px solid #282c37;
+    border-top: 1px solid $color1;
     text-align: left;
   }
 
   & > thead > tr > th {
     vertical-align: bottom;
-    border-bottom: 2px solid #282c37;
+    border-bottom: 2px solid $color1;
     border-top: 0;
     font-weight: 500;
   }
@@ -25,11 +25,11 @@
   }
 
   & > tbody > tr:nth-child(odd) > td, & > tbody > tr:nth-child(odd) > th {
-    background: lighten(#1a1c23, 2%);
+    background: $color1;
   }
 
   a {
-    color: #2b90d9;
+    color: $color4;
     text-decoration: underline;
 
     &:hover {
@@ -51,11 +51,11 @@ a.table-action-link {
   display: inline-block;
   margin-right: 5px;
   padding: 0 10px;
-  color: rgba(255, 255, 255, 0.7);
+  color: rgba($color5, 0.7);
   font-weight: 500;
 
   &:hover {
-    color: #fff;
+    color: $color5;
   }
 
   i.fa {

app/assets/stylesheets/variables.scss

@@ -0,0 +1,8 @@
+$color1: #282c37; // darkest
+$color2: #d9e1e8; // lightest
+$color3: #9baec8; // lighter
+$color4: #2b90d9; // vibrant
+$color5: #fff; // white
+$color6: #df405a; // error red
+$color7: #79bd9a; // succ green
+$color8: #000; // black