As far as I know, none of the official releases (even that 1982 tape) have accurate colors, at least if aiming for the original theatrical look.
Correct me if I'm wrong, but wasn't all video releases made from separate prints which didn't have the alien subs in them? I know some of them had dark scenes brightened at least.
Your PS78 tape might just be the best we have. Or negative1's upcoming release of course.