I have a Raidmax Xoxide Storm Case (Black) I am probably going to get a Lanparty NFII Ultra B Mobo. I would like to paint the inside of the case but I dont know what color to use. Since the Mobo will be green with green IDE cables I don't think that green will be a good color for the case. Any suggestions on colors and also fan colors?

personally i would go with black

I agree, black looks slick, and goes with just about anything.

when i painted the inside of my case i went with a flat black (spray paint). but black is the way to go. it brings out the rest of your mobo instead of drawing attention to the nothing around the mobo.
syro

plus black absorbs heat. It will help dissipate some of the heat from the inside of the case. Keep in mind the effects will be very small.