Deep gray and all the other accents in silvery old wood and cream. This will add drama, allow the other elements to bring ion light and set off the concrete wall as a true feature. If you want light instead of drama, then go for a very pale beige stone. It will echo stone colours in both the concrete and rocks...

Did you end up painting the ceiling all the same? That's what I would've done!

Everyone has their own individual tastes e.g. the three examples you have provided are not my cup of tea. I prefer to keep the walls neutral and add treasures I love to express my personality. My personality is displayed in my entire room not just the walls.

House in process of build. Dilemma about what to use instead of tiling walls. Came across a thread which suggested running the floor tiles up the vanity wall to create a feature. However I am not having a tiled floor but laminate planks with the label claiming100% waterproof flooring. Has anyone done this with flooring? I definitely do not want tiled walls. A number of queries..... 1. would the flooring still be affixed on the wall as the floor? 2. Would I take it to the ceiling...... so below and above wall hung vanity and above mirror? 3. Since I would not use this to feature the bath in the same room. What do you suggest I put here? The bath is a 1700 long btw/corner. I have never seen baths without some form of splash back? But I don’t want tiles.