well since we are going to consider the name DarkFuel....I picture a dark grey such as a #333333 - 666666 ish range for the background, and maybe for the lettering of the logo a medium/ dark red, blue or green. Red would work more for a dark as in scary look, the blue for more of a techy dark look, and the green because the fuel image in my mind makes my think of some green ooze coming from like an xbox or something. like alien blood or something. i dunno.
Then with any of these, you must accomidate a more tactful navigation and gui. maybe instead of just using the typewriter font for GAMES WITH HORSEPOWER...try something thats like coming out of the background making it look like it punching through (NOT EMBOSSED OR BEVELED THOUGH). Maybe make it look like its being blown away by adding lines to it. Get creative.