I'm sorry if it seems like I'm snapping here, but I really wish more people would get that the GOUT is not an ideal reference when it comes to the colours.

Harmy is attempting to recreate the theatrical version of Star Wars here. The colour timing of the original theatrical release was very different to what we have since seen on home video. Look through the thread and you'll see that same thing written over and over. The original theatrical colour timing was also notoriously inconsistent, so you will likely see colour errors in this version that are completely intentional on Harmy's part.

You cannot compare Harmy's colours with the GOUT, cause the latter is a desaturated mess which, colour-wise, has nothing to do with the way the film appeared originally.