I would leave it as it is. If you really are thinking about painting your car, repaint it the same color, or similar to your existing color (like another shade of red).

Over the long run, you will probably regret having another color as you will eventually see problems with the paint. It might chip, or crack or fade somewhere. And what's worst is that because it's a drastic color change any flaking or chipping will be really obvious (the red will stick out really bad from a white car).

Just my dos centavos... h: