The Electroclash Grey looks great with the ivory interior. Our interior is black but we didn't really have a choice (but hey, at least it's practical!). Even though Electroclash is metallic, it's still an unusual sort of grey and so I think it suits the 500. However, I agree with someone else who mentioned Tech House Grey. I was disappointed when Fiat discontinued Punk Grey, and think the non-metallic nature of Tech House suits the car well. Volare Blue is also really really nice, and at the end of the day, it's your choice! I'd personally go for whatever's least 'common'