这是使用如下的代码画出来的：

private void panel1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)

  {

   int StartPosition=0;

   for(int i=1;i<0xa7;i++)

   {

    e.Graphics.DrawString(((System.Drawing.KnownColor)i).ToString(),this.Font,Brushes.Black,20+StartPosition,(i%65-1)*10);

    e.Graphics.FillRectangle((new Pen(Color.FromKnownColor((System.Drawing.KnownColor)i),1)).Brush,0+StartPosition,(i%65-1)*10,19,20);

    StartPosition=(i/65)*170;

   }

  }