For me I think I’d prefer a lighter colour, maybe something akin to a fog with some varieties in the consistency of it so it doesn’t feel like a solid wall of grey-white.

Hooloovoo

My understanding is that blind people don't see black or any other colour, they just...don't see. I've seen it described as "what colour do you see behind you when you look straight ahead?"

That said, probably just black I guess, if I had to choose.

Probably a warm colour like the shade of red you see wghen closing your eyes while facing a lightsource

Doesn't matter as I would be blind and couldn't see it.

Black of course. Otherwise, how could I ever sleep at night?

But if it could go black in the night and another color in daytime, I would have green like lush, fresh meadows.

Translucent neon clear with a hint of purpular pastel.

A dark grey.

Problem with going blind is that you can’t close your eyes and see darkness anymore. Dark grey is super boring, but it would allow me to sleep reasonably well.

Octarine