redC = Int32.Parse(red.Text);
            greenC = Int32.Parse(green.Text);
            blueC = Int32.Parse(blue.Text);

            Bitmap bitmap = new Bitmap(image);

            //edit image
            List<int> list = new List<int>() { redC, greenC, blueC };

            Random rnd = new Random();
            Color color = new Color();
            Color color2 = new Color();
            color = Color.FromArgb(255, redC, greenC, blueC);

            for (int x = 0; x < bitmap.Width; x++) {
                for (int y = 0; y < bitmap.Height; y++) {
                    if (bitmap.GetPixel(x, y) == color) {
                        List<int> list2 = list;
                        int max = list2.IndexOf(list2.Max());
                        Console.WriteLine(list2.Max());
                        Console.WriteLine(max);
                        list2[max] += rnd.Next(-20, 20);
                        if (list2[max] > 255) {
                            list2[max] = 255;
                        } else if (list2[max] < 0) {
                            list2[max] = 0;
                        }
                        color2 = Color.FromArgb(255, list2[0], list2[1], list2[2]);
                        bitmap.SetPixel(x, y, color2);
                    }
                }
            }

            pictureBox1.Image = bitmap;