code: function adjustLuminance(rgb, lum) {
    var newRgb = {};
    newRgb.red = calculateLuminance(rgb.red, lum);
    newRgb.green = calculateLuminance(rgb.green, lum);
    newRgb.blue = calculateLuminance(rgb.blue, lum);
  
    return newRgb;
  }
docs: Adjusts an RGB color by the relative luminance
  
  @private
  @param {Object} rgb rgb color value to convert
  @param {Number} lum percentage of luminance
  @return {Object} RGB color values