Quick demo of using only parts of chroma.js

index.js

require('chroma-js/src/io/hex');
require('chroma-js/src/io/lab');

const chroma = require('chroma-js/src/chroma');

console.log(chroma('#cc7d8e').lab());

package.json

{
  "name": "test",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "build": "rollup -c"
  },
  "dependencies": {
    "chroma-js": "^2.0.0"
  },
  "devDependencies": {
    "rollup": "^0.67.4"
  }
}

rollup.config.js

import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';

module.exports = {
    input: 'index.js',
    output: {
        file: `test.js`,
        format: 'cjs',
    },
    plugins: [
        resolve(),
        commonjs(),
    ]
};