@Argonor - I think there was a variation in colour in the uniforms, so many people paint the tops Feldgrau and the bottoms in grey.
Luftwaffe uniforms were all grey rather than Feldgrau.
Note however that the M1944 uniform used a different type of Feldgrau that was of inferior quality and this so-called "Feldgrau-44" was actually more brown than green.
I have a general question now - apart for Leibstandarte in the 1930s, who else used the all black uniform?