Should the grout be the same color? Not necessarily. Will it look weird to use a darker gray on the floor and a lighter gray in the shower? Not at all. Any recommended colors for the shower and floor tiles along these lines? I've been getting stuff at Lowe's and they carry MAPEI Warm gray for the subway tile, and silver for the hex, if you lke a darker grey for the hex. Silver is actually a medium grey, but it'll appear alot darker with the white tile. Our bathroom isn't perfectly square. I think a colored grout seam that is uneven will be really obvious(that's my understanding where you would do any flubbing). Can you grout just the seam white? Can you skip grout and caulk it? Any suggestions here? Grout everything on the floor the same color. it'll actually show up more if you try doing what you suggested. It'll literally draw attention to it. What you want to dpo is make sure that you're square to the most obvious walls from the door. Especially with the hex, it won't be quite as obvious as you think, unless it's WAY out, and then nothing you can do will hide it, even using a blending color grout. One other thing-- that joint where the floor hits the walls should be caulked, but still caulk it with a caulking that matches the grout, both color AND texture. Does anyone know what the measure is for hex tile and subway? For subway, use unsanded, and for the hex, use sanded.

I'll definitely try to get a hold of a sample of Silver Shadow as I can see from responses here and posts elsewhere that it is quite popular. I'd still love to hear from anyone regarding Warm Grey, Smoke Grey and Mobe Pearl. How do they range in terms of light to dark? Which comes closest in tone to Misty Grey, which seemed like a good color, but too dark? I want to avoid any blueness (so don't think Platinum would work), while also steering clear of too much beige (Mobe Pearl?). Thanks for the comments so far!

All of the tile I used for my bathrooms and kitchen came from RAI Design in Garden City, NY. Specifically I used their light blue penny round tile in the shared bathroom and for my backsplash in the kitchen I used their tile called “Soho”. The “Soho” tile dimensions are labeled as 2x10 but the actual measurements of the tile are about 2.25x9.75. Not too big or too small and the white color is not too bright so as to compete with my white cabinets. I looked at SO MANY white tiles and this one was the best dimensions and color, and rather inexpensive, too. I highly recommend RAI if you are not too far from NY.

I'd do black floor, grey shower. A white or lighter grout WILL end up looking black'ish eventually in those high traffic areas. I can't tell you how many houses I looked at that had two toned grout; the high traffic areas had dark brown while the edges of the rooms would be light tan. You won't have to get down on your hands and knees with a toothbrush trying to clean the white/light grout saving your knees and back for years to come.