code: function fromNamed(color) {
    const el = document.createElement('div');
    el.style.color = color;
    if (el.style.color !== '') {
      document.body.appendChild(el);
      const rgb = getComputedStyle(el).color;
      document.body.removeChild(el);
      return rgb;
    } else {
      return '';
    }
  }
docs: Return named color as an rgba string.
  @param {string} color Named color.
  @return {string} Rgb string.