Here's the room with the lights on. Much warmer. Sorry the first photos I forgot to turn on the light!

I like your bathroom!

You need something unique. Ai created a mother-of-pearl backsplash that looks nice with your beautiful room.

depending on the length, you could find a ready made marble threshold and router a fancy edge to add for a backsplash.

thresholds come in a variety of whites/creams at most home improvement centers.

I hope you took a sample of the wallpaper and tested being able to clean it.

I just installed a wallpaper in my 'informal' powder room and when I tested their standard paper with a bit of makeup, it started to fall apart when I wiped it with a damp paper towel.

Luckily they also offered a commercial/contract grade finish and some splattered foundation cleaned right up with a damp paper towel. I also wanted the wallpaper to be more sturdy in case my cleaning ladies accidentally got some cleaning product on it near the toilet area.

I don't have any good or helpful solution for you, but just want to say that you are winning the fun and funky bathroom award-so much fun! Good luck, I feel that you will definitely use that imagination to find a great solution!

i love the mother of pearl backsplash. do not use marble. it absorbs everything

Your bathroom is very eclectic so adding one more finish will just be part of the look. Instead of the geen onyk from wet bar (even if available), maybe search for a remnant that works with the paper AND sink’s finish. In the meantime, just get some plexiglass to protect the paper. It’s not only the paper to consider but sealing the gap attractively.

If you want to further protect your wallpaper in addition to a backsplash,try painting over it with “dead flat varnish”. It gives you a wipeable surface and doesn’t affect the look of the paper. My wallpapered kitchen backsplash is still going strong after 4 years.

Very cool powder room!

Using marble as a backsplash in your powder room will not be an issue. I have a bathroom that is used every day - the entire countertop is polished marble + has marble backsplash + side splashes. It's been installed for five years - and there are only a couple etching spots (only on the countertop) that no one else sees (except me - and only if I specifically look for them). I've never sealed it since installation - and water still beads up on it. Marble is not as "tender" as many people believe - at least not in a bathroom.

Personally, I think that the fabricator should make you a backsplash after putting holes in your wall that were unnecessary. I am wondering if a brass one might look nice - have it match the brass trim pieces on your vanity? I think the brass would look nice up against the wallpaper.

However, I don't know if the brass on your current vanity is lacquered or unlacquered? or if it will age. I don't know how much work it is to use unlacquered brass due to water splashes. I guess if you just let it age naturally, eventually it will just darken and be fine - however, if lacquered brass was used on the vanity - you'd want the two materials to match.

I assume that the metal that was used for the rest of the vanity won't change due to water splashes - it may be the safer way to go.

A nice piece of marble would be my second choice. I love marble - you'd want to select one that doesn't stand out - it needs to blend. The "star" of this room is the vanity. You've already added in a "co-star" with the wallpaper - I wouldn't add a piece of marble (or any type of material) that would draw someone's eye to the backsplash.

Sorry I am confused the 3 holes I see are for your faucet that I do not see so why not a pice of the same metal as the sink for a backsplash then it will look as if planned,