Wow. I’ve long thought the officer uniforms in Jedi were green. Neat!
Yeh. The material they used was Feldgrau (Field Grey). Which looks grey in some light conditions, brown in others and even a slight green tint in others. The problem is that ROTJ theatrical prints were screwed up in reproduction for release. Some were very blue and others have a boosted cyan channel. Same happened with ESB. I was told on very good authority that the ONLY version of ESB that ever had the correct grading was the 70mm version that was shown at the London Premier.
Now, thanks mainly to the screwed up SE’s, costuming groups think that the uniforms should be olive green, when they are not.