https://www.sherwin-williams.com/visuali... look here for a fun tool to play with color.
My bathroom floor tiles are dark brown, wenge wood effect tiles, and the wall tiles are a light creamy colour (with a slight hint of beigy/yellow).
Some of the walls are only half tiled, and I have no idea what colour to paint them. I love neutral, muted colours, but not sure about using them against the tiles (it may look too bland). Not sure about having a darker colour on the walls, with dark floor and light tiles.
Don't want any bright colours, or blues, reds, bright yellows etc. I love greys, and browny/pinks, but don't think they'd work. Wish I'd gone for a different colour wall tile.