public static void ChangeColor(Bitmap src, Color color, IEnumerable<Pixel> changedPixels)
 {
     var lockBitmap = new LockBitmap(src);
     lockBitmap.LockBits();
     foreach (var changedPixel in changedPixels)
     {
         lockBitmap.SetPixel(changedPixel.X, changedPixel.Y, color);
     }
     lockBitmap.UnlockBits();
 }
        public static Bitmap ChangeColor(Bitmap src, Color color)
        {
            var result = new Bitmap(src);
            var lockBitmap = new LockBitmap(result);
            lockBitmap.LockBits();

            var compareClr = Color.FromArgb(255, 255, 255, 255);
            for (var y = 0; y < lockBitmap.Height; y++)
            {
                for (var x = 0; x < lockBitmap.Width; x++)
                {
                    if (lockBitmap.GetPixel(x, y) == compareClr)
                    {
                        lockBitmap.SetPixel(x, y, color);
                    }
                }
            }
            lockBitmap.UnlockBits();
            return result;
        }