Originally posted by: Wer-Al_Zwowe
That’s because mr. Lucas and his team screwed up the colors before sending the movies to Lowry.
It appears you are correct, a bloke called Rick Dean who’s a director at THX was responsible for re-timing the colour on ANH (source). But it’s only fair to blame Lowry for faults like the obliteration of the laser bolt glows and the starfield.
Mod Edit: a working link to the linked article above can be found here:-
https://web.archive.org/web/20041207162619/http://uemedia.net/CPC/directorsworld/printer_10457.shtml
(‘Restoring the Star Wars Trilogy’ - by Matt Hurwitz. Oct 14, 2004, 00:33)