Very hard to say the colour given it is a B&W image. These standard Heer Litzen might be Artillery red or even Pioneer black.
As a conscripted pole serving in France in 1942-3, Cassel, Saint Malo and Normandy, it could be artillery. Not sure about pioneer, please explain, not heard of that one.
Pioneer = Engineers.
Thank you o wise one.
Could have been a pioneer then, bugger. I'll try and do some more digging around.