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Automatic Color Palette Generation
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Palette Webpack Plugin is an open source project and completely free to use.

However, the amount of effort needed to maintain and develop new features and products within the Roots ecosystem is not sustainable without proper financial backing. If you have the capability, please consider donating using the links below:

Palette Webpack Plugin allows you to generate a JSON file during the build process containing your color palette from existing Sass maps and/or Tailwind.

While we hope someone may find this useful for other purposes, this plugin and it's output format were specifically built for handling WordPress' Gutenberg editor-color-palette theme support feature.

• Built to take the headache out of maintaining the WordPress editor palette.
• Merge, filter, and sort Sass color maps and your Tailwind theme colors with a configurable priority.
• Uses computer vision algorithms to detect and deprioritize grayscale colors to the bottom of the list.
• Gracefully loads Sass and/or Tailwind support as needed.

To begin, you'll need to install palette-webpack-plugin:

$ yarn add palette-webpack-plugin -D

Then add the plugin to your webpack config. Here is an example containing the default values:

webpack.config.js

const PalettePlugin = require('palette-webpack-plugin');

module.exports = {
  plugins: [
    new PalettePlugin({
      output: 'palette.json',
      blacklist: ['transparent', 'inherit'],
      priority: 'tailwind',
      pretty: false,
      tailwind: {
        config: './tailwind.config.js',
        shades: false,
        path: 'colors',
      },
      sass: {
        path: 'resources/assets/styles/config',
        files: ['variables.scss'],
        variables: ['colors'],
      },
    }),
  ],
};

If you are using Laravel Mix, you may use the Mix helper like so:

webpack.mix.js

const mix = require('laravel-mix');
require('palette-webpack-plugin/src/mix');

mix.palette({ ... });

The plugin's signature:

webpack.config.js

module.exports = {
  plugins: [new PalettePlugin(options)],
};

webpack.mix.js

mix.palette(options);

The general idea is to file_get_contents() and json_decode() the palette and pass it to add_theme_support('editor-color-palette', $palette).

Here is an example of doing that:

/**
 * Register the initial theme setup.
 *
 * @return void
 */
add_action('after_setup_theme', function () {
    /**
     * Enable theme color palette support
     * @link https://developer.wordpress.org/block-editor/developers/themes/theme-support/#block-color-palettes
     */
    add_theme_support('editor-color-palette', json_decode(file_get_contents('path/to/palette.json'), true));
}, 20);

When using Sage 10, you can take advantage of the asset() helper to fetch the palette. A good place for doing this would be in setup.php with the other add_theme_support() options.

/**
 * Enable theme color palette support
 * @link https://developer.wordpress.org/block-editor/developers/themes/theme-support/#block-color-palettes
 */
add_theme_support('editor-color-palette', json_decode(asset('palette.json')->contents(), true));

$black: '#111';

$colors: (
  'red': '#f54242',
  'black': $black,
  'not-actually-black': '#42f596',
  'random-gray': '#858c89',
  'white': '#fff',
  'blue': '#4287f5',
  'orange': '#f5b342',
);

would be transformed to:

[
  { "name": "Blue", "slug": "blue", "color": "#4287f5" },
  {
    "name": "Not Actually Black",
    "slug": "not-actually-black",
    "color": "#42f596"
  },
  { "name": "Orange", "slug": "orange", "color": "#f5b342" },
  { "name": "Red", "slug": "red", "color": "#f54242" },
  { "name": "Black", "slug": "black", "color": "#111" },
  { "name": "Random Gray", "slug": "random-gray", "color": "#858c89" },
  { "name": "White", "slug": "white", "color": "#fff" }
]

Contributions are welcome from everyone. We have contributing guidelines to help you get started.

• Add tests.
• Split into components.
• Convert to TypeScript?

Keep track of development and community news.

• Participate on the Roots Discourse
• Follow @rootswp on Twitter
• Read and subscribe to the Roots Blog
• Subscribe to the Roots Newsletter
• Listen to the Roots Radio podcast

Palette Webpack Plugin is provided under the MIT License.