System.Drawing.Color.GetHue C# (CSharp) Method

        public float GetHue() { throw null; }
        public float GetSaturation() { throw null; }

 public bool IsOldStar(Color pixelColor)
 {
     return ((pixelColor.GetHue() >= 150) &&
         (pixelColor.GetHue() <= 258) &&
         (pixelColor.GetSaturation() >= 0.10) &&
         (pixelColor.GetBrightness() <= 0.90));
 }