Okay, so you meant the other way around: a little lighter background! Maybe, you could be a little more specific next time, my friend? ;)
Anyway, I'll take a look at it. But for now, it stays like it is! And precisely because, this is not my own original creation, I've tryed to preserve the original look of the theme(s) as much as possible - out of respect for the original author's work! B) But, off course, there's always room for improvement, such as: touching up the graphics and adjusting the contrasts where it's needed, and so on...