Dragon Ball

[Nindo]

Ultimately, it all comes down to what you think is best for what you are going for, we as critics can only give you an opinion based upon our experience and our bias. I personally would go for two tints of more contrasting color, as seen in my edit, but that is purely what I would do. I'd say, if you aren't quite sure what you want to do with this yet, work on the various options you have until you are sure which of the options is best. You've got the pure black and grey hair, a contrasted blue hair to facilitate a black color, and the more heavily contrasted dark red and blue to try and represent black to the viewer's eye.

However, if you are sure what you want to do, work on what you see is the most fit for what you want to do.