The pre war arm of service colours were scarlet for generals and staff , crimson for royal guard, green for infantry, dark blue for artillery and violet for engineers.
Officers had dark green cap bands on the peaked caps and dark blue upper parts of tunic collars.
The collar patches in the first 2 photos look quite pale, perhaps a lighter green shade.
The seated officer in the last photo in pale grey uniform has collar patches of a similar shade to the cap band, also some of the soldiers have similar darker patches. I think these could be green.
I would have assumed the pre war arm of service colours were used , but the new /neutral government may have used new colours.