Can't go wrong with charcoal in my opinion, love it. Classic colour.

What a great job you did. So good that you just went with white. The concrete floor tile on wall behind the vanity would have been too busy after now having seen the finished product.

Sorry to keep you waiting. Busy as crazy doing another bathroom in the house. Hopefully the last for a while. Yes it is paint behind the vanity. After much deliberation I went ahead and painted it. It is easily wiped down for any accidental splash back but unless your bathing in your washbasin there’s hardly ever any The floor tiles, and in fact all the tiles are from Moorabbin Tiles. Polished porcelain. Thank you for your kind feedback

You may be lucky & the tiles may come off easily if just laid (we just did this in our shower). Worst case when they pull them off they may damage the membrane, in which case they will need to repair it, so it is just the time of the repair & drying, before they can relay the tile. If it's important to you, get them to fix it, as long as you can accept the worst case scenario of the extra time (that is what we did, and then the membrane was fine anyway). Good luck.