IMO its a personal preference thingy, I've always had a thing for red when it comes to my cars (on my forth one in a row) so for me the Eddy looks best in that colour. Others say Candy, Steel, Black or Reflex. Would look good in blue though. If I wasn't to pick Red I'd go with Reflex Silver.
Reflex Silver is the way ! Best of luck with what ever you choose