public static Color FromHueSaturationBrightnessAlpha(float hue, float saturation, float brightness, float alpha)
{
return (Color) Object.FromIntPtr ((IntPtr)ObjCMessaging.objc_msgSend ((IntPtr) ObjCClass.FromType (typeof (Color)).ToIntPtr (), "colorWithDeviceHue:saturation:brightness:alpha:", typeof (IntPtr), typeof (float), hue, typeof (float), saturation, typeof (float), brightness, typeof (float), alpha));
}