src/color.js
// toCSSValue() is never be called
toCSSValue() is never be called
toCSSValue () is never be called
toCSSValue() {
    return (
      'rgba(' +
      100 * this.red + '%, ' +
      100 * this.green + '%, ' +
      100 * this.blue + '%, ' +
      this.alpha +
      ')'
    );
  }
toCSSValue ( ) { return ( 'rgba(' + 100 * this . red + '%, ' + 100 * this . green + '%, ' + 100 * this . blue + '%, ' + this . alpha + ')' ) ; }
toCSSValue() is never be called
toCSSValue () is never be called