Pick the floor tile first, then the paint color. You should be able to find a wide variety of floor tiles to go nicely with the mother-of-pearl, THEN relate the wall color to not only the tile but the cabinet color, which you don't mention in your note.

Where is this tile being used?

I'm guessing this will be used as a backsplash? What are the countertops and what color cabinets? And what kind of lighting? If you have LED lights, they make things cooler (bluer) than traditional lights. And how many windows? Light affects everything!

The mother of pearl is for the shower. Husband chose this first...not after the floor or wall tile. That's the real dilemma. Now I am struggling to chose just the right floor and wall to match or enhance the mother of pearl tiles. This was the only one he liked related to showing less grout. Thanks for the help!

Some ideas. Marble and mother of pearl, subway white tiles and MOP, and notice light gray walls in first pic.

It depends the way you want to go,,cool colors or warm...For a cooler color, you could go with a gray floor. For a warmer feeling, go with a cream/beige floor. Those tiles are beautiful

I would go with a gray stone floor and use a light gray or possible white on the wall. Keep the room light a fresh with gray accents on varying shades. I think this will give you bath a clean spa feel.

Thank you all for the wonderful ideas. I love the modern, contemporary and eclectic styles. I just don't trust myself. The house I purchased is a DuPont house called Georgian. Some say stay true to the era but it needs so much updating. DuPont was one of the first communities in the Nashville area. It's called Old Hickory Village, back in the day they made bullets, who knows what else!
Thank you all for the help!!

Please make sure that the mother of pearl that you purchased can be used in a shower. Not all MOP products can be.

What color vanity and countertop would look the best with the white or gray tones? I initially chose soho style vanity and expresso with white Zeus Quartz countertop. Thanks for the suggestions!

I think a warm grey wall colour would look great with these tiles!

something like this:

Something in a porcelain tile that looks like wood would look nice.you could go with a
Quartz stone counter top that resembles marble. With the Mop you could use grey or tan undertones.

This would look nice for countertops

For the floor, you might want to look at Eramosa,,it comes in different shades,,grays and beige. Here is an example with the gray. For the Zeus quartz, have you seen it in the store? I like how it looks in photos and I was going to use it for the bar counter, but in reality it looks unnatural

I agree , it's great for modern high end bathrooms but I'm not sure for this project. I love clean lines and light, clean spaces. Back to the drawing board for countertop material. Quartz is so durable and sometimes durable is a necessity! The grays sound great...if I can just make decisions. I like the subway glass looks, if I can find a color to accent the mother of pearl tiles. Would subway glass in light gray, white or a cream work for the walls?

Breathren I don't think you could go wrong with either one. White or off white.

Thanks to everyone that made my choices much easier! I chose the white subway tile., the porcelain wood look tiles in silver/gray, not an overly busy look at all! Thanks for all the help! Any other suggestions ?

The subway tiles are not the ceramic look but the thicker glass with white background. The white ceramic did not play off the mother of tile as well!

I think a grey or taupe glass subway time would be nice. As for the counter top, quartz would be great. It's clean and simple. I wouldn't do anything with a pattern because I think it might get too busy. Would a cement counter be too modern for you? It would be a nice contrast with mother of pearl...but too much if glass is being used as well.