I have black and IMO it's hard to maintain clean, but even dirty it looks great. Here is a picture I took without washing for about two weeks and it always stays outside.
Here is one clean and with rejex.
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2006 Coupe black 6sp automatic 3LT.
Born 10/24/05, delivered 10/28/05, picked up 11/02/05.
APS TT with 465 rwhp and 477 rwtq @ 6.5 psi
Z06 widebody, brakes and sway bars; HRE 543R black with polish lip; bilstein shocks; magnaflow's 15884 exhaust system; 44 LED 3rd brake light; GS stripes; tinted windows and more.
Custom
cobalt red &
black two tone leather interior by DownSouthVettes and some of Pipedreams' items.