The camouflage smocks depicted on your MB figures are in reversible spring/fall Oak-Leaf pattern. The fall pattern has patches of very dark brown and the spring side has very dark green, but neither scheme has any black in the pattern.
If you really want to do this correctly, invest $18.95 in Osprey's; Modelling Waffen-SS Figures. This will give you the proper colors and techniques to produce these complicated camo schemes.
And if you don't already have one, I highly recommend you buy at least a 10/0 brush, I personally use a 20/0 brush for detailing figures.