The colors were never that consistent throughout the OOT.
It’s simple, they where basically white and what we see are color shifts due to the special effects.
With each photographic pass the film shifts a bit towards yellow, magenta or cyan… Here’s a random image that shows this: https://i0.wp.com/www.coffeewithkenobi.com/wp-content/uploads/2017/01/A-wing-ROTJ.jpg?ssl=1
Notice the Cyan window supports and specially the magenta A-Wing. Each element has a different shift.
Jedi, having more complex effects, suffers a lot from this.