embd/bower_components/gumby/sass/functions/_palette.scss

// Color Pallete

@function getColor($key, $state: false, $list: $ui-coloring) {
  @each $color in $list {
    @if $key == nth($color, 1) and $state == default {
        @return nth($color, 2);
    }
    @else if $key == nth($color, 1) and $state == hover {
        @return nth($color, 3);
    }
    @else if $key == nth($color, 1) {
        @return nth($color, 1);
    }
  }
  @return false;
}

@mixin palette($shade, $palette-text-color:false) {
  @if $shade == getColor($shade) {
    @if $palette-text-color != false  {
      color: $palette-text-color;
    }
    @else {
      color: lighten(getColor($shade, default), 80%);
    }
    background: getColor($shade, default);
    border: 1px solid getColor($shade, default);
    &:hover {
      background: getColor($shade, hover);
      border: 1px solid darken(getColor($shade, hover), 3%);
    }
    &:active {
      background: darken(getColor($shade, default), 10%);
      border: 1px solid darken(getColor($shade, default), 10%);
    }

    @if $shade == default {
      @if $palette-text-color != false  {
        color: $palette-text-color;
      }
      @else {
        color: darken(getColor($shade, default), 61.5%);
      }
      border: 1px solid getColor($shade, default);
      &:hover {
        border: 1px solid darken(getColor($shade, hover), 5%);
      }
    }
    @if $shade == warning {
      @if $palette-text-color != false  {
        color: $palette-text-color;
      }
      @else {
        color: darken(getColor($shade, hover), 40%);
      }
    }
  }
  @else {
    @if $palette-text-color != false {
      color: $palette-text-color;
    }
    @else {
      color: lighten($shade, 80%);
    }
    background: $shade;
    border: 1px solid $shade;
    &:hover {
      background: lighten($shade, 30%);
      border: 1px solid lighten($shade, 27%);
    }
    &:active {
      background: darken($shade, 10%);
      border: 1px solid darken($shade, 10%);
    }
  }
}