Here are some related insignia. Some shoulder boards(I am missing three colors). Notice that there are three layers. The nebenfarbe(specialty color) is in the center layer. The branch color(waffenfarbe) is the bottom layer. In this case, they are dark green for Administration. The NCO level shoulder boards were intertwined bluegray cords. Lower level had plain cords Middle Career level had the cords with a silver colored center cord in the rope. I have several middle career level boards and one lower level board. Most admin collar tabs are in dark green. But in rare cases, they can be found in different colors as well. Dark Green- Generalized branch color for all Administrative branches. All specialties eventually wore this type of collar tab. Wine Red- Justice Officials and GFP Cornflower Blue- Thus far un represented in reference books. Guessed to be medical related. Light Green- Air Traffic Control Officials(switched to dark green tabs in 1940) Bordeaux- Courtsmartial Officials Black- Construction Administrative Officials(1944)