The WinColorPicker control emulates the Visual Studio color picker and displays system colors, web colors, and a customized palette:
Appearance support — Full Appearance support including alpha-blending, gradients, image, etc.
Built-in Theming — Supports Standard, Office 2000, Office XP, Office 2003, Visual Studio 2005, and Office 2007 themes.
Null Text — Display a custom string when the control’s current value is null.
Style - Change the style of the color palette.