Even when I lived in France 22 years ago I noticed that the French preferred cars in dark metallic neutral colours. I also realised that Britain is the only country in the world where people actually buy red cars. The worst period of British automobile history was the brown and tan of the Leyland seventies - BL Sandglow is still used to paint Land Rovers for expeditions and Camel Trophy type events.
My bike is grey because it's unpainted titanium. Luvverly.