Imho, the ships in the first scene were always too grey/blue since the Special Edition. The Stardestroyers had a slight beige tone while the other ships were bluish grey. And Endor had a little bit of green. So I fiddled a little bit with a 4K83 screenshot. Maybe the TIEs are a little bit too purple. What do you think?
The colors were never that consistent throughout the OOT. The only film to more consistently feature beige star destroyers was ANH, and even there the tractor beam shot featured a blue star destroyer, or more likely a beige star destroyer lit with blue lighting.