Add color scheme

sass/utilities/derived-variables.sass

@@ -20,15 +20,32 @@ $purple-invert: findColorInvert($purple) !default
 $red-invert: findColorInvert($red) !default
 
 $primary-invert: findColorInvert($primary) !default
+$primary-light: findLightColor($primary) !default
+$primary-dark: findDarkColor($primary) !default
 $info-invert: findColorInvert($info) !default
+$info-light: findLightColor($info) !default
+$info-dark: findDarkColor($info) !default
 $success-invert: findColorInvert($success) !default
+$success-light: findLightColor($success) !default
+$success-dark: findDarkColor($success) !default
 $warning-invert: findColorInvert($warning) !default
+$warning-light: findLightColor($warning) !default
+$warning-dark: findDarkColor($warning) !default
 $danger-invert: findColorInvert($danger) !default
+$danger-light: findLightColor($danger) !default
+$danger-dark: findDarkColor($danger) !default
 $light-invert: findColorInvert($light) !default
 $dark-invert: findColorInvert($dark) !default
 
 // General colors
 
+$scheme-main: $white !default
+$scheme-main-bis: $white-bis !default
+$scheme-main-ter: $white-ter !default
+$scheme-invert: $black !default
+$scheme-invert-bis: $black-bis !default
+$scheme-invert-ter: $black-ter !default
+
 $background: $white-ter !default
 
 $border: $grey-lighter !default
@@ -55,6 +72,8 @@ $pre-background: $background !default
 
 $link: $blue !default
 $link-invert: findColorInvert($link) !default
+$link-light: findLightColor($link) !default
+$link-dark: findDarkColor($link) !default
 $link-visited: $purple !default
 
 $link-hover: $grey-darker !default
@@ -81,7 +100,7 @@ $size-large: $size-4 !default
 $custom-colors: null !default
 $custom-shades: null !default
 
-$colors: mergeColorMaps(("white": ($white, $black), "black": ($black, $white), "light": ($light, $light-invert), "dark": ($dark, $dark-invert), "primary": ($primary, $primary-invert), "link": ($link, $link-invert), "info": ($info, $info-invert), "success": ($success, $success-invert), "warning": ($warning, $warning-invert), "danger": ($danger, $danger-invert)), $custom-colors) !default
+$colors: mergeColorMaps(("white": ($white, $black), "black": ($black, $white), "light": ($light, $light-invert), "dark": ($dark, $dark-invert), "primary": ($primary, $primary-invert, $primary-light, $primary-dark), "link": ($link, $link-invert, $link-light, $link-dark), "info": ($info, $info-invert, $info-light, $info-dark), "success": ($success, $success-invert, $success-light, $success-dark), "warning": ($warning, $warning-invert, $warning-light, $warning-dark), "danger": ($danger, $danger-invert, $danger-light, $danger-dark)), $custom-colors) !default
 $shades: mergeColorMaps(("black-bis": $black-bis, "black-ter": $black-ter, "grey-darker": $grey-darker, "grey-dark": $grey-dark, "grey": $grey, "grey-light": $grey-light, "grey-lighter": $grey-lighter, "white-ter": $white-ter, "white-bis": $white-bis), $custom-shades) !default
 
 $sizes: $size-1 $size-2 $size-3 $size-4 $size-5 $size-6 $size-7 !default

sass/utilities/functions.sass

@@ -10,29 +10,43 @@
       // or a colors list with at least one element
       @if type-of($name) == 'string' and (type-of($components) == 'list' or type-of($components) == 'color') and length($components) >= 1
         $color-base: null
+        $color-invert: null
+        $color-light: null
+        $color-dark: null
         $value: null
 
         // The param can either be a single color
         // or a list of 2 colors
         @if type-of($components) == 'color'
           $color-base: $components
-          $value: $components
+          $color-invert: findColorInvert($color-base)
+          $color-light: findLightColor($color-base)
+          $color-dark: findDarkColor($color-base)
         @else if type-of($components) == 'list'
           $color-base: nth($components, 1)
-          $color-invert: null
-          // Check if the invert color is provided,
-          // otherwise compute it
-          @if length($components) > 1
+          // If Invert, Light and Dark are provided
+          @if length($components) > 3
             $color-invert: nth($components, 2)
+            $color-light: nth($components, 3)
+            $color-dark: nth($components, 4)
+          // If only Invert and Light are provided
+          @else if length($components) > 2
+            $color-invert: nth($components, 2)
+            $color-light: nth($components, 3)
+            $color-dark: findDarkColor($color-base)
+          // If only Invert is provided
           @else
-            $color-invert: findColorInvert($color-base)
-          $value: ($color-base, $color-invert)
+            $color-invert: nth($components, 2)
+            $color-light: findLightColor($color-base)
+            $color-dark: findDarkColor($color-base)
+
+        $value: ($color-base, $color-invert, $color-light, $color-dark)
 
         // We only want to merge the map if the color base is an actual color
         @if type-of($color-base) == 'color'
           // We merge this colors elements as map with Bulma's colors map
           // (we can override them this way, no multiple definition for the same name)
-          // $merged-colors: map_merge($merged-colors, ($name: ($color-base, $color-invert)))
+          // $merged-colors: map_merge($merged-colors, ($name: ($color-base, $color-invert, $color-light, $color-dark)))
           $merged-colors: map_merge($merged-colors, ($name: $value))
 
   @return $merged-colors
@@ -76,8 +90,9 @@
 
 @function findDarkColor($color)
   @if type-of($color) == 'color'
-    $l: 29%
-    @if lightness($color) < 29%
-      $l: lightness($color)
-    @return change-color($color, $lightness: $l)
+    $base-l: 29%
+    $luminance: colorLuminance($color)
+    $luminance-delta: (0.53 - $luminance)
+    $target-l: round($base-l + ($luminance-delta * 53))
+    @return change-color($color, $lightness: max($base-l, $target-l))
   @return $text-strong

sass/utilities/mixins.sass

@@ -170,7 +170,7 @@
   @extend %unselectable
   -moz-appearance: none
   -webkit-appearance: none
-  background-color: rgba($black, 0.2)
+  background-color: rgba($scheme-invert, 0.2)
   border: none
   border-radius: $radius-rounded
   cursor: pointer
@@ -190,7 +190,7 @@
   width: 20px
   &::before,
   &::after
-    background-color: $white
+    background-color: $scheme-main
     content: ""
     display: block
     left: 50%
@@ -206,9 +206,9 @@
     width: 2px
   &:hover,
   &:focus
-    background-color: rgba($black, 0.3)
+    background-color: rgba($scheme-invert, 0.3)
   &:active
-    background-color: rgba($black, 0.4)
+    background-color: rgba($scheme-invert, 0.4)
   // Sizes
   &.is-small
     height: 16px