This article says they’re ”Moorish plywood tiles”. I’m not familiar with them, hopefully someone else can give more info.

https://www.houzz.com/magazine/houzz-tour-modern-farmhouse-basks-in-ojais-pink-moments-stsetivw-vs~104553541

Your inspiration picture is lovely. It looks to me like it is tile with some grout lines, but it is hard to tell.

1. It's hard to say if those are triangle tiles or square tiles divided into two colors and laid randomly. This line has similar square tiles combined with other shapes. So maybe you could search their line. Or perhaps the designer just pulled the triangle shapes from the mixed tiles? https://www.perigold.com/bath/pdp/ivy-hill-tile-quincy-8-x-8-porcelain-stone-look-wall-floor-tile-sost4737.html?piid=55658969 also at Home Depot https://www.homedepot.com/p/Ivy-Hill-Tile-Quincy-Dark-Gray-7-87-in-x-7-87-in-Matte-Porcelain-Floor-and-Wall-Tile-10-32-sq-ft-Case-EXT3RD106336/316105074 

eta, I just saw Jinx's post about them being plywood? Maybe porcelain would work for you ^^^^

There is always the option to select any tile you like. Have them cut on 45's . Yes you will pay labor but your choices are limitless.

There are lots of companies that have geometric tiles. Here’s one.
https://www.fireclaytile.com/blog/full/triangles-introducing-4-new-tile-shapes

If blow up the OP’s picture you can tell they are square tiles divided in to 2 colors. like the one picture above by Olychick.

That's what I thought, too, Maddielee and was surprised to see that the article about that bathroom states they are plywood??? Maybe that's a typo for something else, like a brand name line of Moorish tiles? Or maybe a reference to the color? A google search for those brings up nothing. Lots of Moorish tiles but not plywood.

I didn't find that exact tile at this site, but I didn't look through them all. I'm posting this just in case the OP ever comes back to this thread; this tile line looks like it would be a dream come true for a quilter wanted to design a pattern in tile:

zia tile

Ok, I was looking for a different tile and this showed up! This is 12x12 https://www.perigold.com/bath/pdp/bedrosians-palazzo-villa-12-x-12-porcelain-wall-floor-tile-bedr4035.html?piid=39782334

Louisville tile should have it.

Oly, you got it — it’s a typo. I did some further research and it’s Moonish plywood tile. The author of that article got it wrong twice! The powder room has it, too.

Examples:

https://www.remodelista.com/posts/moonish-co-of-brooklyn-removeable-plywood-wall-tiles-in-geometric-patterns/

I was wondering why nothing was coming up for Moorish plywood tiles!