This is why you keep finishes to a min. Now all you can do is find a grout that works with all of them. I would choose something like a soft gray maybe about the middle one of the ones posted.

Are you tiling a vanity top?

the vanity top is quartz, the quartz is to the left of the hexagon in the third picture. These were selected by a high end designer who also does contracting. We paid for designs but she was too expensive for contracting for us. She is too busy to do just design work so I am left to figure out these kind of things and I am terrible at this kind of thing.

Ok, that makes more sense. What I am worried about is that the countertop is reading more gray and the floor tile both for the shower and the bath floor are reading more taupe/beige to me. It could just be my computer monitor, but the vanity top seems like it needs a warmer color. What does the vanity cabinet look like. (painted, wood, etc.). I might select a solid warm white for my counter with this combo in addition to a bit of a softer white subway.

yes vanity is painted white. the counter top is msi rolling fog and it does have a little of the warmer beige taupe to it in my opinion. My photos probably aren't that accurate. I am confident that these items all match because of the designer I went with but I just don't know how to pick grout.

this last pic is from the designer. Better lighting than my pic.

Hoping at least that all the white elements match?

If the last picture is indicative of the actual color I think that the shower floor and regular floor tile go nicely together. They seem to be warm beige tones. The counter still looks off to me and if it's called rolling fog, it's gray. The floor has movement and the counter has movement. I'd pick a solid counter. However, I'd probably use white grout to unify things.

A light gray works well. Try "Prism" from Home Depot.....