I would gladly learn VFX stuff and modify the lip-syncing of the characters to redub the planet’s name as Korriban. The shot of the Sith statues with the orange ambience just speaks KOTOR.
Korriban is widely known to those it concerns, though, so it wouldn’t function as a secret base. All the more reason to stay close to the official blue grade to differentiate it from Korriban. It also really suits Palpatine. I do like the “grey” recolor though. Something along those lines might be good.
I’ve only seen the orange recolor, has gray been done yet? I can see grey mixed with green from the machine like someone else suggested to imply the Nightsister magic