The KV tanks had steel rimmed road wheels.
I have read of two different colors being used on Soviet WWII tanks, a light mint green and white. I would think that White is the more likely color.
There are a few pics on this thread here of a KV-1 interior. It appears to be white
http://armorama.kitmaker.net/modules.php?op=modload&name=SquawkBox&file=index&req=viewtopic&topic_id=104442&page=1