The Set Color dialog of the Wacom Display Settings utility allows you to further customize Pen display settings. To open the dialog, choose Custom Color from the Color Setting menu in the main Display settings dialog.
If supported by your device, you can also adjust the following color qualities:
The Set Color dialog provides sliders for adjusting individual RGB and CYMK colors. You can also enter the hex value of a particular color and then adjust it with the sliders.
The above screenshot is for descriptive purposes; it may not match your screen.