Metallic colors are generally the best colors where you don't notice dirt right away. Lighter ususally being better.
Solar Yellow is cool, but you do see road grime on it, not so much mud/dirt. Black is the worst, by FAR. You'll see *everything* on it. Of course, when it's clean - it's simply amazing. I almost got one.
------------------
2001 Solar Yellow SE 4x4 V6 5spd