“United Colors” causes purification status to unambiguously become untracked for Sepulchresand Richardo’s starting location (there isn’t a way you can calculate it from tracked variables because those rooms have a background colour override, and therefore their Purification status wouldn’t show up in the background colour) – it also causes it to ambiguously become untracked for Ritual Chambers (which can never “become” Purified, but that doesn’t completely discount the possibility that they actually *are* Purified – a common scam in Nomics is to create things in a state that they could never legally get themselves into after creation). Additionally, there are circumstances in which at least Richardo’s starting location genuinely *could* be a Purified room, so we can’t rely on “there’s no way this room could have become Purified, therefore it’s unPurified”.

This proposal makes it so that rooms with a background colour override can never be Purified (the starting location is automatically unPurified, as are Ritual Chambers, and the removal of Sepulchres in Purified rooms is set to happen immediately rather than waiting for someone to do it manually, so that there can never be a period of time in which a room is Purified and a Sepulchre simultaneously). It also prevents them being Cleansed, to avoid the weirdness that would happen if you could Cleanse a room without Purifying it as a consequence.

This is necessary to avoid the introduction/reintroduction of an untracked variable if “United Colors” passes, and arguably also in the current gamestate if “Purity, untracked” fails. It still makes sense as a standalone proposal even if “United Colors” fails, but in that case, it’s just a pure (if very minor) gameplay change rather than something that’s necessary to avoid breakage.