Both the original 1977 film and the 1997 Star Wars SE are all over the place as far as the colour grade goes.
The original ESB is better than Star Wars, but the grade still varies a lot.
So many comp shots and different base films and a lack of digital colour grading at the time all lead to an inconsistent grade. I haven’t watched Jedi enough to be able to confidently say how it looked in 1983 as far as colour goes, other than that the Jabba palace scenes were extremely dark.