Taubmans chilly water (more green) or misty rain (more blue). i'm sure there was a design dilemma post from a while back that gave the Aussie paint answer to this question. Hopefully someone who knows will see this and link it.

We installed a feature wall of tiles in our bathroom of a similar pale blue-green colour to your examples. The closest dulux colour I came across was dewpoint. (Not quite close enough to be painted alongside the tile so we went with white for the non-tiled portion of wall so I can't show you a sample of it painted but might be worth looking at).

Do you want modern or classic look. China white for classic it changes from grey-to light greenish colour I have it in the same facing room, or for more contemporary try Big white from Taubmans , it's a white with a bit of grey in it very soft. With your grey sofa I would stay away from darker greys and north facing room can make it really dark in the afternoon.

Actually....I have one more white paint question everyone if you don’t mind! We will be using terrazzo tiles in the bathroom (off white base with Carrara marble chips) and white textured subway tiles. I had planned to paint the remaining sections of wall white too but now I’m on this white paint odyssey I’m wondering if it’s going to work or if I’d be better to go with a contrasting colour instead. If I do paint with white, should I match it back with the wall tiles? The closest colour is lexicon which is obviously pretty cold/blue - the room has a large east facing skylight but I’m concerned about it feeling a bit sterile...appreciate your thoughts! Thanks again for your help.