Don't like. You're probably going for a different look and not run-of-the-mill, but I've always liked gunmetal. I think it'd look great with those rims and the P5 color. My $.02.
For the color of the car... I'd say black, gunmetal or same blue as body. If major contrast is desired then maybe silver with black lugs. That red might be better on white, silver or red car.