#ramblings continue

The other thing I've mention before is that you can go for the friendship ending. Basically unveiling different colors based on who's platonic relationship you've maxed out on.

I've been thinking of how exactly that would come off in the plot. Because I'm leaning on two sides of the spectrum.

Either a massive freakout or internal screaming from suddenly seeing yellow, for example, in a pool of grey. I believe anybody would initially put off by seeing a splash of color they've only seen once before and nothing else. Like the bouts of confusions and existentialisms would be pretty high since it's not a well known or documented phenomenon in universe. The questions that spring forth about their potential soulmate would mount as maybe MC did found them in Paris and didn't know. Or if this was a consequence of a broken bond since that's has been known to happened.

Or maybe the brain treats as simply a light grey or white to protect MC from the onslaught of questions. Like you're talking casually with one of the ROs and mention blue, for example, of a painting and now they're freaking out. The RO now questioning if they're your soulmate or you've met your soulmate without telling them. And the further confusion that results from seeing that you only recognize one color instead of the entire rainbow. Which could lead to a interesting conservation if the RO in question is associated with that color.

Just more thoughts as I write this.