I think my favourite so far is Arancia Atlas you get from the Lambo Murcielago.
Put it on my Mini Cooper S. Would love that car in real life.
I saw an article in a car magazine once about AMG custom made cars. There was a guy who was totally obsessed with that colour and wanted an AMG C63 in Arancia Atlas. They did it, with all black trim and rims. It looked amazing.
Actually, now that I've thought about that, I think I'm going to do that to my Mercs tonight....