I think the pink that’s coming out in some of the day scenes is actually accurate to what we know about ESB, in particular the 1980 VHS bootleg (which is overly pink, but gives a good hint as to how much blue there is) and some scans.
Back in '95 or '96 the American Film Institute showed the trilogy at their theater at the Kennedy Center. Empire looked very pink, particularly the laser blasts on Hoth. I assumed it was a damaged print and the best they could find (the crawl was in Korean). It would be interesting to find out that that’s how it was supposed to look.