I stand corrected. Not all home video releases show the Leia/R2-D2 corridor scene with neutral colors. I looked at the first 1982 laserdisc release and guess what:
Sorry I’ve not read this thread before, and am late to the party, but those panels are in fact quite green. I saw one of them out at the ranch in tjhe mid 90s when I was there.
Also, on the SE prints, they are pretty much as green as on the IB Tech prints.
The Tantive corridor panels also had a very slight mint-green to them, at least the ones I saw in person did. I also saw the head of the droid in the Tantooine shot, it was more yellow than orange, but not quite as crazy yellow as the bootleg.
The home releases are all over the place, telecine operators tend to balance towards neutral and colour correct on the fly. The operator would have made many decisions that had little to do with how the prints looked in cinemas.
As for R2 looking cyan in some shots, and arguing he should be white, well of course he is painted white, which means he will pick up any reflected light and take on some of that hue. In a predominantly greenish-blue environment, he could look a little cyan.
I’ll post some shots from the SE prints in the SE thread for comparison, but here is one from the SE print.