blue grey by farrow and ball.

One option would be to choose a fabulous rug/bed-linen, then pull wall colours to coordinate from there.

🌈

I agree with Marylee, choose your bedding, bed etc first then paint the walls to tie in with them.

There are so many different greys and grey/beiges, it's impossible to say which colour to paint the room. And I agree with the above comments, that it's easier to match paint to fabric (bed linen/blinds) than the other way around.

Having said that, I might go for a caramel colour. Maybe Dulux Spiced Honey or a similar one. Or a pinkish/beige caramel, like in the last photo.

All cosy colours. Nice for a bedroom and I think it will go with the more than 50 shades of grey that exist.

The first photo with the sofa is Spiced Honey. I don't know what the others are.

It depends a lot on the carpet, is it grey that looks cool and a bi blue, or beige and warm? A soft warm colour would be my choice in a shadowy room, something like a dirty browny pink or as Caroline says a toffee or sandy colour.

So presumably you don't want white walls, albeit F&B white (expensive)? Find some bedding, curtains, etc. you really like and go from there.