You are going to have to leave your comfort zone on this one. Walnut is "brown", you have "pink" as a counter top. I would suggest going with another version of the colours already in the room. you have gray/beige and white. I would hesitate going white...but it can be done. You can move into the grays and be very happy (it would look very modern) or you can move into a beige that holds a hint of pink in it (not pink...but a blush of warmth). Or you could go really wonky and add in something like a brushed stainless steel look to the cabinets and have it go "space age". There are specs of blue/gray in this counter top. The next think to look at is an "ashwood" or dark gray wood presentation that has some blue in it. It would lighten the space yet still add drama that dark cabinetry offers.

Bathroom floor tiles have their own specifications. If you go to a tile shop and ask for the same, you'll get it with all the required specs specially designed for bathrooms.

To keep it simple and clean, install a small glass shelf or 2 of maybe 10mm thick glass and 10-12” x 4” on the side of the shower wall for keeping soaps and shampoos, a watch and specs or a mobile too. Or maybe add a small glass cabinet. These are available or can be easily made to order.

Need to send the requirement specs.