Around that time of the war there was wide variation to the uniforms worn by the germans due to supply problems, quite a few of them would be wearing field grey uniforms of various shades, some would also be wearing camo smocks with the splinter pattern on them. Panzer troops would be wear the black panzer type uniform.
A discussion on painting German Uniforms can be found
http://www.finescale.com/fsm/community/forum/topic.asp?TOPIC_ID=34928
Hopes this helps