This plugin generates a set of css vars from tailwinds colors list and puts then into the :root selector.

Install

yarn add tailwind-color-vars
# or
npm i tailwind-color-vars

API

colorVars({ colors, strategy = 'override', colorTransform } = {})

Creates tailwind plugin that registers colors from config as css vars.

• colors: [optional] an object with colors to extend, replace or override config colors
• strategy: [optional] string:
  • extend_: will merge config colors with given colors, config ones will take priority
  • override_: will merge config colors with given colors, given ones will take priority
  • replace_: will discard config colors and only use given ones
• colorTransform: [optional] Function that will be invoked on every color value before injection

Usage

In tailwind config

const colorVars = require('tailwind-color-vars')
module.exports = {
  plugins: [
    colorVars(),
  ],
}

This will produce css like:

:root { 
  --transparent: transparent;
  --black: #22292f;
  --grey-darkest: #3d4852;
  --grey-darker: #606f7b;
  --grey-dark: #8795a1;
  ...
}

To extend, override or replace colors:

const colorVars = require('tailwind-color-vars')
module.exports = {
  plugins: [
    colorVars({
      colors: {
        'primary': 'rgba(0, 80, 200, 0.7)',
        'black': 'black',
      },
      // default value, this will give passed values priority
      strategy: 'override',  
    }),
  ],
}

This will produce:

:root {
  --primary: rgba(0, 80, 200, 0.7);
  --transparent: transparent;
  --black: black;
  ...
}

To process every color value before injection you can specify colorTransform. For example you can transform all values to a set value type:

const colorVars = require('tailwind-color-vars')
const tinycolor = require("tinycolor2");
module.exports = {
  plugins: [
    colorVars({
      colors: {
        'primary': 'rgba(0, 80, 200, 0.7)',
        'black': 'black',
      },
      // this will give priority to config values
      // so black will not be overridden
      strategy: 'extend',
      // this will parse each color value and return it in `rgb()/rgba()` format
      colorTransform: col => tinycolor(col).toRgbString()
    }),
  ],
}

This will produce:

:root {
  --primary: rgba(0, 80, 200, 0.7);
  --black: rgb(34, 41, 47);
  --transparent: rgba(0, 0, 0, 0);
  --grey-darkest: rgb(61, 72, 82);
  --grey-darker: rgb(96, 111, 123); 
  ...
}