PLAAF J-7B colors

Info I’ve seen (Trumpy paint call outs :roll_eyes:) says the J-7Bs were white. Photos look more like a light grey. (Maybe akin to FS 36622 … US SEA camo lower surface ?) Newer scheme is a bluish grey. ID codes are shown as red. Some are yellow. Newer reg? Naval aviation? Any pointers?

FS36628? bsr