i think ALMOST every color looks good on mustangs. some of the puke green are ugly and some light light blues are to. but most dark colors and some bright colors work. i love them all. all unique in their own way.
Mach 1's look good in actual colors with the black spoiler, mostly DSG, T Red, Azure blue, Zinc yellow, & Comp. Orange.
'03-'04 cobras look good in any color haha.
When I went to the stealership to pick up my 02 sonic blue GT, I ended up coming home with an 01 True Blue. Less miles, and lower price. I should have taken the Sonic Blue, especially because it had chrome bullitts on it already, but I fell in love with True Blue. Although, the sonic blue had cloth interior over my crap leather.
I think Fluffyrunnels has the only other color I would consider nowadays...