This is the closest anyone's actually come to the whole "Explain it without using the words" thing I keep asking for.
I'd love (no snark, no ulterior motive) the... aggressively pro-trans and aggressively pro-female safe space sides to explain me their solutions to the problem using that language.
I don't think I'm "aggressively" anything other than "aggressively opposed to" being called names and denigrated repeatedly.
That said...
In public restrooms and clothing store dressing rooms, people who are pink, or a very pale shade of orchid, should use the pink room. People who are blue, or a very deep shade of violet, should use the blue room.
In locker rooms and showers, and spaces where people are likely to be naked, people who are pink, and people who have had their blue bits removed, should use the pink room. People who are blue, or have had their pink bits removed, should use the blue room. If a blue person still has blue bits, but every other part of them is pink and nobody suspects them of having blue bits, they can probably get away with using the pink room because nobody is going to notice... just keep those blue bits covered. And vice versa of course. Ideally, there'd also be a pink/blue/purple/orange room available for those who don't feel comfortable in either the pink or the blue rooms.
In prisons, domestic violence refuges, and rape shelters, the general rule should be that pink people and blue people should be kept separated, regardless of what color they feel like. But I think it would be reasonable to allow some case-by-case exceptions once in a while, because some blue people who have had a full-body spray-pinkening, and who have had their bluest bits removed, probably would be safer in with the pink people, while also not raping the pink people. I think it would be reasonable to allow pink people who feel blue, even if they've had a spray-bluing and have removed their pinkest parts, to be put in with the pink people - they're still pink on the inside, and due to the ways that blue people and pink people are conditioned, they're very unlikely to try to rape fellow pink people.
Because of how society has treated pink people for a long time, and continues to treat pink people today, I don't think that blue people should be counted as pink people when it comes to awards, recognitions, executive positions, or political office. Society craps on pink people on a regular basis as it is, and I don't think that blue people can really appreciate how crappy it is, and I don't think they can really understand or represent the concerns and issues that are important to pink people.