I recently had the front bumper cover, hood, roof, and trunk painted on my jet black ZHP. I cannot see any difference between the old and new paint, although the guy who did it does have a reputation for impeccable quality--a real Michelangelo type. Anyway, he said something I hadn't heard--that black is the easiest to color-match...
2004 BMW 330i ZHP (52k miles), Jet Black with black leather, MFactory LSD (3.38) with Z4 cover, 18"x8.5" ET38 APEX Arc-8's (Anthracite) with 245/40 Michelin PSS', Koni Sports with factory springs and front and rear reinforcement plates, Shark Injector, Corsa TSE3 cat-back exhaust, TMS under-driven pulleys (water & steering), CDV delete, TMS CF strut brace, K&N CAI, GAS DISA rebuild, TMS pedals, Wheelskins steering wheel cover, roller tray center console, black-out grilles, and WeatherTech mats