Personally, I think dark, vampy colored lips (like dark blue or burgundy) look amazing on darker skinned ladies. Sometimes it really does depend on the shade and the undertone of the wearer also. Definitely give it a try, it sounds like a bold fun way to branch out from the normal pink and nudes! Note though, I've heard that the NYX soft matte lip creams aren't good for darker shades. Heard they apply patchy and uneven.