the skies on Tatooine are blue because the skies on Tatooine (Tunisia) ARE blue… They’ve been desaturated on home media (especially in the UHD) but have always been and meant to be a deep and bright blue…
If they’ve been desaturated on home media, does that not imply that they’re meant to be desaturated? You may as well show us pictures of Mexico City and claim that all the Hollywood movies that give it a yellow color grading are wrong. At that point, your complaint is with color grading itself, not the artistic intention behind it.
By home media I don’t mean every single release, just the UHD. Even the 2011 BD has had the correct sky saturation, though the hues and other colors were off in that release. Also the original SD version of revisited also suffered from desaturation due to Ady’d at that point undeveloped cc skills. The sky color in these comparisons is correct. I should know, I’ve spent the past 10 years color grading Star Wars, (as you have also been) and you as much as I who’s worked on many film prints, you always get that deep blue when you dig deep enough. It’s supposed to be like that. Toning it down would make the sky appear darker than it should be…