so, field grey was the traditional colour, but officers would als wear a plainer grey fom the full dress uniform.
the other green is called reed-green and was summer uniform later in the war, but it would fade quickly.
the fighting branch of the guys with the two runes were first issued camo in 1940, but did not wear them exclusively - this is a common misconception that might come from the wish to distinguish them
there were quite a few camo designs, so a mixture would not be that problematic.
Some Volksgrenadier units were regarded elite, so wouldn't have had trouble to get camo smocks
for more detailed Info better ask someone else