Natural colors for cocoa butter

I am looking for source for natural color for cocoa butter. Any ideas? I use chef rubber's natural collection but I am not happy with some of the colors.(other colors are great) They separate from the cocoa butter and clog the airbrush. When I stain them I am left cocoa butter that is pale  and a lot of color in the strainer. Maybe I am not handling to cocoa butter correctly but since I have consistent good result with some colors and not others I think maybe that's not it. Thanks