Bestest colors I've owned would probably be British Racing Green (dat old MGB) and the A4's Ocean Blue Pearl. That blue pearl was freaking beautiful. Third place would be the old Miata Classic Red with a Camel (tan) top and Camel interior, that was a striking combo.
I love the Le Mans Blue of my 04 Vette. That's the right shade of blue. Too bad I don't get to drive it much, it's a nice machine even though it's nearly 20 years old.
The 4Runner is basic gray, because the Toyota blue in that model year was terrible. I almost traded it for a Tacoma that was a good blue a few years back, but I knew my wife would kill me if I did.
Oh well, it hides the dirt really well. So I got that going for me, which is nice.