Add an eyedropper tool like in Blend.
Users sometimes need to add additional color modes like Pantone, RGB 0-1. They need both adding the mode in the Combo and configure the Sliders. However, a way to configure the conversions from model to model in code behind and a way for producing colors are needed.
ColorEditor to be placed in Window which opens on a Buttons's Click. The Button is located inter StandartPalette in RadColorPicker and it is titled More Colors or Edit Colors. This feature is demonstrated in the new ColoPicker's First Look Demo but it could be implemented out of the box as well.