I think you're on the right track. I'd forgo chair rail and do wallpaper floor to ceiling. IMHO, a powder room/half bath can be considered a little jewel box.

Thanks so much for all the comments and advice! So incredibly helpful. I do really appreciate you all taking the time to comment. And I hear those who say I don’t need a backsplash but I think I prefer one. Plus our wall isn’t completely straight so think we need one (granite doesn’t look perfectly straight where it meets the wall). In hindsight, i probably should have just gotten one made with the granite. Oh well! We have 2 more bathrooms I’m learning for ;) BeverlyFLADeziner- great suggestion re: artwork. I totally agree now that I look at it yet couldn’t pinpoint the issue! I will work on that and relocate my photo. I also planned to put something above the toilet..maybe a shelf? Thoughts? Patricia Colwell Consulting- yes, the toilet paper is in a odd spot! but we had to put it there, unfortunately due to the toilet being too close to the wall. And we just didn’t want to move it (we’re on a slab). But we can reach it perfectly! Mayflowers- maybe a grey/taupe tile? And I love the idea of a hex mirror... in fact, I’ve been looking for one but haven’t found one that’s the right size yet. Thanks for noticing the hex floor tile. I love it. Designer Drains- great! what backsplash would you recommend? Thanks again for all the comments and advice. Really helpful! I’m thinking either a mother of pearl or grey/taupe tile backsplash (which would pick up that color from the granite and floor). Either preference? And if I go with the grey, could I get a mother of pearl framed mirror? I’m at the coast and love the coastal look of it. Thanks!!!

I agree, simple. Played a little with a very crude rendering of color and shape. Simple rectangle is the best IMO. If you want some color, add some bright hand towels. Oval burnt orange Rectangular red ORB rectangle

I would pick up on the green in the tile and paint the walls a muted green. Otherwise look for a whimsical black and white wallpaper.