I don't think so. Black gives tanks a lot of depth, and tons of room for contrast. Dang, I really want black sand now! I don't think it'd be too much black at all. If you have Photoshop or something like it, you could always "try it on" in a picture!
"Be exactly who you want to be, do what you want to do! I am he and she is she, but, you're the only YOU!"