Link is for a different unit which operated in the area but I'm pretty sure they were in Dunkelgelb by then either with or without camo. One of the 4.7cm SP was ko'd on Hells Highway and was in Dunkelgelb. The Flammpanzer also were when Arnhem was liberated in 45.
I would say the same for KG Schulz. There was an early StuG also ko'd on Hells Highway possibly from this unit in plain dunkelgelb which was inspiration for this.
Panzer I ko'd in Nijmegen was in full 3 colour camo.
Pictures of these are in Market Garden Then and Now iirc.
Panzer II pictured in Opheusden October 44 also dunkelgelb
I'm painting a Zvezda model to represent this at the moment