I suggest purchasing some pretty shampoo and soap bottles in white which will hide most of the blue tile. I like your tile selection, but understand if you don’t care for it, so I’d try to minimize the look rather than totally hide it with a fake stick on. I have similar bottles and love the uniform look now to my shampoo and conditioner.

You could probably have the white tile installed in the back of the niches right over the blue tile. It would make the niches that much shallower, and I am not sure why you would want to do that, but anything peel and stick would look much worse than just leaving the niches as they are. Why cheapen a well-done tile job?

I think it looks nice! but as another pistee said, if you have bottles in there, the tile wont stand out as much and you might be happier

Looks fantastic. What’s not to like?

To those who replied, thank you. I feel much better now. Great idea and realization that just inserting some shampoo bottles and such will help. We've been using the new downstairs shower so long, forgot that eventually we'll have product in there to hide the niche some. :)

Now to find a nice shower curtain on a curved rod to complete the look.... that should only take another 5 months. ;)

I know you’re now settled on just leaving them as is but I still want to say how nice I think the whole wall looks. Love the clear blues with crisp white. And, I really like the small hexes in the niche!