ColorEx
public static ColorEx FromColor( System.Drawing.Color color ) { ColorEx retVal; retVal.a = (float)color.A / 255.0f; retVal.r = (float)color.R / 255.0f; retVal.g = (float)color.G / 255.0f; retVal.b = (float)color.B / 255.0f; return retVal; }