Comparison: 2 prius's 1driver very differnent MPG??

Yeah maybe that's going a bit too far but the color really does seem to make some amount (maybe not a really big amount) of difference. Where I live it can get pretty hot and last time I owned a dark colored car I thought I could feel the difference, especially when first getting in after it had been parked in the sun.

When I was recently looking for a S/H prius I held out until I found a "super white" one and I'm glad I did. I'm more than happy with the looks even though my choice was really more for safety (visibility) and good heat reflection than for aesthetics.