I’ve done a quick color correction of the first reel of poita’s 1997 SE scan, which also serves as a color reference next to the technicolor references for my regrade. Here are the Tantive IV shots and a few Tatooine shots as a bonus:
Not necessarily an error, as it probably is how it was graded in the first place, but seems the closeups of that one rebel soldier have noticeable more mint color in the walls than surrounding shots.