Custom Colours

How do I add a folder to containing custom colours on a default surface to the appearances/photoworks toolbar ?(e.g. Plastic with a range of RAL colours).

Ideally I want a folder on the left with various RAL colours on a standard 'low gloss plastic finish' that I can quickly apply to parts. It would be easier than editing the part appearance every time.

Thanks

SolidworksParts And Features