Is the deco tile a teal? I'm looking for a 12x24 matte porcelain tile in solid or near solid mid-tone gray with a touch of the blue green that picks up the color in the deco tile.

The vanity ties in the brown tile nicely.

The existing tile looks like a good match to me, but if you think it's too much beige, try to match your stripe. If you do stick with the tan, get some bath mats that match the stripe.

Thanks. Great idea about accesories that match my stripe, thank you

Tracefloyd yes, the contrast tile is teal. Thanks for the tile suggestion. I was considering light grey for contrast.

Pick one of the beige colors from the marble, not as yellowy-tan as the old tile. Borrowing samples from a local tile shop will help get a good coordinating color.

IMO a really plain tile for the floor in a color from the shower walls and I would not want to highlight that very dated accent tile at all You towel color works with nothing in the space either A wall color as close as possible to a color in the tile too

Do you like the color of your vanity? Consider painting it a warm whitish color, which will brighten up the room and reduse all the brown. If you are intent on changing your floo, look for tile/ wood-look tile that leans towards the gray stripe above your tub. But that can open a whole new can of worms. What is the floor immediately outside the bathroom? It's good to keep the floors as consistent as possible throughout your home.