Microsoft.Xna.Framework.ColorExtensions.GetBrightness C# (CSharp) 메소드

        public static float GetBrightness(this Color color)
        {
            byte minval = Math.Min(color.R, Math.Min(color.G, color.B));
            byte maxval = Math.Max(color.R, Math.Max(color.G, color.B));

            return (float)(maxval + minval) / 510;
        }