BBS are very secretive when it comes their paint codes IIRC, seems odd I know, they're only silver after all!
A load of threads on other forums and no answer one way or the other. There are a fair few different colours of silver as far as BBS are concerned, even the Silver colour used on the CH, CH-R and VZ wheels are all different apparently even though the wheels are (roughly) the same in appearance.
I've been looking into it just in case I FUBAR on of my BBS VZ's (with no luck).