code: function fromHSV(h, s, v, a) {
    var color = create();
    setHSV(color, h, s, v, a)
    return color;
  }
docs: Creates new color from hue, saturation and value
  @param  {Number} h - hue (0..1)
  @param  {Number} s - saturation (0..1)
  @param  {Number} v - value (0..1)
  @param  {Number} [a=1] - alpha (0..1)
  @return {Array}    - RGBA color array [r,g,b,a] (0..1)