ColorDialog colordialog1 = new ColorDialog();
                colorDialog1.FullOpen = true;
                Color[] colorList = {
                    Color.Black,
                    Color.Brown,
                    Color.Red,
                    Color.Orange,
                    Color.Yellow,
                    Color.Green,
                    Color.Blue,
                    Color.Violet,
                    Color.Gray,
                    Color.White,
                    Color.Gold,
                    Color.Silver,
                    Color.Transparent,};