I need to change the colour on the V5 for my NC30 and was wondering what colours DVLA say the type 6 is? Thanks

You could go for whatever the undertray would say - e.g NH196 = white.

Or, the catch all... "multicoloured"

The bike is a type 4 and on the V5 it has black/silver down as the colour but I've got type 6 fairings on the bike now so i most likely need to change the colour on the V5 but just not sure what to? Lol

mine was a type 1 and the v5 says multicoloured

Multicoloured it is then. Thanks :-)