I wouldn't paint the car a very dark color with those rims. It will cause them to blend in and you will loose the details. Of course this is simply my opinion. I would go with a lighter to medium blue. Colors you may want to consider are Marina Blue, Jetstream Blue, and Admiral Blue. Those are corvette colors. Lucerne Blue, Martinique Blue, and Nocturn Blue are Trans Am colors. Can you tell I like blue?
You could always do a shade of green or yellow too!
I'm right there with you on styling decisions a lot of them time. That's why I typically believe in less is more and keeping it simple. If not, I'll overwhelm myself. Good luck and keep up the good work!