Ember Color Palette Component

_ember-color-palette-component.md

• Technique lifted directly from https://scotch.io/tutorials/aesthetic-sass-2-colors
• base.scss comes before color-palette.scss
• The palette-color scss function lets you do things like border-bottom: 1px solid palette-color('background', 'dark'); or color: palette-color('primary');

base.scss

// Credit
// - http://sassmeister.com/gist/ac4322cc0564cd37c432
// - https://scotch.io/tutorials/aesthetic-sass-2-colors

$ColorPalette-colors: (
  'primary': (
    'base': #a80101,
    'light': #d9534f,
    'dark': #c9302c
  ),
  'accent': (
    'base': #d98328,
    'light': #dd8f3d,
    'dark': #c57623
  ),
  'positive': (
    'base': #228b22,
  ),
  'secondary': (
    'base': #a4a4a4,
    'light': #d0d0d0,
    'dark': #888,
    'darker': #404040,
    'darkest': #252525
  ),
  'foreground': (
    'base': #010101,
    'light': #676767,
    'dark': #000100,
    'darker': #000
  ),
  'background': (
    'base': #fff,
    'dark': #f0f0f0,
    'darker': #ebebeb,
    'darkest': #ccc
  )
);

$ColorPalette-baseKey: 'base' !default;
$ColorPalette-opacities: (
  'light': .8,
  'dark': .4,
  'darker': .3
);

@function palette-color(
  $name: 'primary',
  $variant: $ColorPalette-baseKey,
  $opacity: 1
) {
  $color: null;

  $colorVariants: map-get($ColorPalette-colors, $name);

  @if $colorVariants {
    $color: map-get($colorVariants, $variant);
  }

  $alpha: if(type-of($opacity) == 'number', $opacity, map-get($ColorPalette-opacities, $opacity));

  @if $alpha {
    $color: rgba($color, $alpha);
  }

  @return $color;
}

color-palette.hbs

<div class="ColorPalette">
  <div class="ColorPalette-color ColorPalette-color--primary"><div class="ColorPalette-colorVariants"></div></div>
  <div class="ColorPalette-color ColorPalette-color--accent"><div class="ColorPalette-colorVariants"></div></div>
  <div class="ColorPalette-color ColorPalette-color--secondary"><div class="ColorPalette-colorVariants"></div></div>
  <div class="ColorPalette-color ColorPalette-color--foreground"><div class="ColorPalette-colorVariants"></div></div>
  <div class="ColorPalette-color ColorPalette-color--background"><div class="ColorPalette-colorVariants"></div></div>
</div>

color-palette.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: ''
});

color-palette.scss

// Credit: https://scotch.io/tutorials/aesthetic-sass-2-colors
$ColorPalette-borderColor: palette-color('background', 'darkest');
$ColorPalette-variantHeight: 1.5rem;

.ColorPalette {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  max-width: 100%;

  *, *:before, *:after {
    position: relative;
  }
}

.ColorPalette-color {
  width: calc(20% - 1rem);
  height: 170px;
  display: block;
  border: 1px solid $ColorPalette-borderColor;

  &:before, &:after {
    content: '';
    position: absolute;
    display: block;
    width: 100%;
    height: 30%;
    bottom: 0;
    left: 0;
    border-top: 1px solid $ColorPalette-borderColor;
    padding: .5rem;
    text-transform: uppercase;
    font-size: 85%;
    overflow: hidden;
    word-wrap: nowrap;
    text-overflow: ellipsis;
  }

  &:before {
    background-color: palette-color('background', 'base');
    font-weight: bold;
  }

  &:after {
    padding-top: 1.5rem;
    font-size: 70%;
    color: palette-color('secondary', 'dark');
  }

  @each $colorKey, $colorVariants in $ColorPalette-colors {
    $baseColorValue: map-get($colorVariants, 'base');

    &.ColorPalette-color--#{$colorKey} {
      background-color: $baseColorValue;

      &:before { content: "#{$colorKey}"; }
      &:after { content: "#{$baseColorValue}"; }

      $variantGradient: (unquote("to bottom"),);

      $index: 0;
      @each $variantName, $variantValue in $colorVariants {
        $variantGradient: append($variantGradient, $variantValue $index * $ColorPalette-variantHeight);
        $index: $index + 1;
        $variantGradient: append($variantGradient, $variantValue $index * $ColorPalette-variantHeight);
      }

      .ColorPalette-colorVariants {
        border-left: 2px solid palette-color('background', 'base');;
        border-bottom: 2px solid palette-color('background', 'base');;
        position: absolute;
        height: $ColorPalette-variantHeight * length($colorVariants);
        width: $ColorPalette-variantHeight;
        right: 0;
        top: 0;
        background: linear-gradient(#{$variantGradient});
      }
    }
  }
}