Where to place a StuG III A?

They were grey for sure. From what I have read, they were too late to be used in France and were mostly used as training vehicles.

EDIT**

After reading a bit in my Squadron book on StuG III's, it says that 4 batteries of A's made it into service during the invasion of France in May of 1940. The above statement was from the Osprey title on StuG III's 40-42. Wonder who is right??