vb net color dialog custom colors
System.Windows.Forms.ColorDialog MyDialog = new ColorDialog();
// Allows the user to select or edit a custom color.
MyDialog.AllowFullOpen = true ;
// Assigns an array of custom colors to the CustomColors property
MyDialog.CustomColors = new int[]{6916092, 15195440, 16107657, 1836924,
3758726, 12566463, 7526079, 7405793, 6945974, 241502, 2296476, 5130294,
3102017, 7324121, 14993507, 11730944,};
// Allows the user to get help. (The default is false.)
MyDialog.ShowHelp = true ;
// Sets the initial color select to the current text color,
// so that if the user cancels out, the original color is restored.
MyDialog.Color = this.BackColor;
MyDialog.ShowDialog();
this.BackColor = MyDialog.Color;