Still, photochemical timing of these specific shots to have such different color, for whatever reason, is something that isn’t ruled out, right? Whether intentional or otherwise.
Certainly not. Maybe Lucas wanted a different color for these shots, because he wanted to differentiate between these scenes, and the ones involving R2’s and C-3PO’s escape, to make sure the audience wouldn’t presume R2, C-3PO, and Leia were still in the same location.