I don't really understand what exactly you're talking about but I tend to think you mean which colour dye you can apply on a black hair. If this is the question, then I think the colour of the dye you choose should match with you skin colour. For instance, you cannot be black with black hair and apply a blonde colour to your hair it will look akward. A black hair goes well with blonde and maroon especially if the hair is short but still long hair won't be bad. Have seen several people apply yellow and blue but it never suits a black hair. As long as you're comfortable with any colour on your hair then there's no problem as long as the colour isn't shouting to the extent that you'll tend to attract people's attention.