tking, hope it's not too late but I have a picture I can post for you now. I'm very happy with the way the two tiles work together. We ended up using platinum grout on the ming hex floor tiles and white on the white subway tiles. The room is very bright from a horizontal window above the shower/tub area. The brightness of the white subway tiles is very pleasing to me. There is a large tree outside the window. The green of the floor tiles ties nicely with the green from the tree. Then everything else is white. Interestingly, in photos the floor looks darker than it does in person. Here is a link that might be useful: Ming green hex and white subway

I used Aquamix Grout Colorant on my kitchen floor which is an epoxy product that seals the tile too. I did not apply extra sealer because it really isn't necessary. P.S. It's not that tedious a process. In fact, it's very easy to do and has very satisfying results.

Very pretty blue tile and such a beautiful improvement! You might want to post this on the Bath Forum, there are several tile folks over there that have great information and are so helpful.

It is VERY difficult to help one pick a grout without being present with the tile and seeing grout samples. There are many different types of grout as well. EPOXY grout Made from epoxy resins and a filler powder, the grout is extremely hard, durable, and nearly stain proof. Often times the bond between tiles is stronger than the tile itself. Many installers don't prefer to use this as you need to work quickly with it....That is MY opinion. You really need to look in to getting some tile bars to put next to your stone. Even if you have, "The Tile Store" in your area... you can go in and they have many color options. The Epoxy grout when cured(I believe about 48 hrs.) is mostly impervious to staining, chipping and cracking yet it can slump. We used Delorean Gray on our floors which are gray tones from very dark to fairly light cement looking 12x24 tiles. It was quite a bit lighter than it looked on the sample, but worked perfectly with our tiles due to the different muted tones in our master bath. Could have been the water mixture or other... however, it was a lighter gray. I could post photos I just took, but it does look a lot lighter in the photos as I have two larger windows in the bathroom and at this time of day it looks light. Are you doing the tile job yourself or is a, "professional" which I will use the term loosely as some are true professional installers and some not. Sanded vs. non sanded vs. Epoxy.... that is first to figure then the color. Do you have, "The Tile Store" in your area? They have many grout bars you can try with the tile which looks darkest gray on my monitor. However, I suggest you find a true tile store to see their tile samples vs. going off of a label at Home Depot and it's color via the label.