The C1ColorPicker control exists as a complete color selection control that you can customize further. When you click the drop-down button available on the C1ColorPicker, the control's interface looks similar to the following image:

The ellipses on the right of drop-down button let you select the basic colors that available in the color picker.

You can also define custom colors by clicking the Default Custom Colors button, creating a custom color from the color palette, and then adding the defined color to custom colors.