Pick the cappuccino to have a contrast with the windows...it will be much more soothing than a stark white.

This is the room in question the furniture will be replaced with a creamy white suite but the carpet will also go when the new furniture arrives

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).