Thanks a lot for the feedaback guys. It’s really great to see you enjoy it so much. And I am glad you are helping each other out.
I believe the color codes in the XML are probably RGBA written in C. But basically there is no magic to this. I actually made all the colors inside cubase. I am most certanly no l33t haxor dude! 
If you want to edit colors or add new ones I think the easiest way is to do it inside Cubase.