What does your car color say about you
Silver – Elegant, loves futuristic looks, cool
White – Fastidious
Vibrant Red – Sexy, speedy, high-energy and dynamic
Deep Blue-Red – Some of the same qualities as red, but far less obvious about it
Taupe / Light Brown – Timeless, basic and simple tastes
Black – Empowered, not easily manipulated, loves elegance, appreciates classics
Neutral Gray – Sober, corporate, practical, pragmatic
Dark Green – Traditional, trustworthy, well-balanced
Bright Yellow-Green – Trendy, whimsical, lively
Yellow Gold – Intelligent, warm, loves comfort and will pay for it
Sunshine Yellow – Sunny disposition, joyful and young at heart
Deep Brown – Down-to-earth, no-nonsense
Orange – Fun loving, talkative, fickle and trendy
Deep Purple – Creative, individualistic
From:
http://www.drivingthenation.com/?p=133 but I've seen this list on other sites as well.