if you are up for a little funky. google retro black & red shower curtain. There are some wonderful designs that would work well in your room. Good luck!

I would just go for a spa white curtain, you've got enough else going on.

a few ideas...

It's a beautiful floor. Why not use a solid colored curtain in a deep color that you love. I could see magenta, sky blue, or emerald green working well. It would add interest without distracting from the floor. The color can be repeated in artwork or towels.

Classic crisp white waffle, let the floor be the star.

I think a shower curtain shouldn’t take over unless there are no other interesting features. Your floor is the star and have fun with pattern, or uniqueness, but would suggest staying with your color scheme and overall vibe, especially with it being a small space

another option... get a couple and swap out every periodically.

Here is a funky one by Innopics, sold on Amazon

IMO a glass shower screen is a better choice and if you must go curtain go white.

I love a white turkish towel type curtain.

I agree that a glass shower screen or a glass arc door would look best. Next to that, something simple and white. The flooring is STUNNING! It should be the star attraction in your bathroom!

I agree with Rawket and Ptreckle tolet the floor be the star. Stick with a neutral for in there.

Since this is a new build, you will have many other chances to go bold else where.

As we often say here, one diva. And, your eyes need a place to rest.