What is it with UBB and rap sites, these days? There are like tons of them!!
Anyway, I'd probably go with something dark, as that seems to go well with rap to
me (not that I like rap, but that's what it reminds me of...). Maybe black bg, dark red or blue table borders, differnet shades of dark red/blue for forum header / category header / altcolumn1 / altcolumn2, white or light grey text, etc.
---Skorpion