function multiply_(color1) {
    for (var _len5 = arguments.length, colors = new Array(_len5 > 1 ? _len5 - 1 : 0), _key5 = 1; _key5 < _len5; _key5++) {
      colors[_key5 - 1] = arguments[_key5];
    }
    for (var i = 0; i < 3; i++) {
      for (var j = 0; j < colors.length; j++) {
        color1[i] *= colors[j][i] / 255;
      }
      color1[i] = Math.round(color1[i]);
    }
    return color1;
  }
Multiply (mix) two or more colors, MODIFIES FIRST ARGUMENT