As far as the uniforms are concerned I’m with Adywan on this one. I don’t know much about the correct colour of Feldgrau but I do know how light reacts strangely with fabrics especially on film. coupled with the blue/cyan tint present in all the special edition blu-rays its understandable that the uniforms might not look as we remembered. I mean can anyone else remember how insane it was when everyone found out the Solo’s coat from ESBR was brown not blue?
If people still aren’t sure just look at rouge one, they based their suits off of those at the Lucas Film archives. Now while the movie does have a slight orange/blue filter applied to it, the set photos do not, and under studio lighting, they appear grey.
I think Adywan has got as close as anyone ever will to replicating the original look of the uniforms with the slightly brown/green grey (you can see that if you colour pic the pixels in PS).