Although normally, I'd recommend going with a lighter shade of gray, I think to do that now would show a difference-- as in we tried this shade on the walls and didn't like it so we changed it for the floor. I'd say you have one of two choices-- either score out the grout on the walls and redo it with a lighter shade (or you could use a grout colorant) and use the lighter shade for the floor, OR you could leave the walls as is, and use the delorean gray for the hex tile, as well.

Yvette Im sorry your upset, It does look lighter in todays photos to me. You have very poor photo quality and in truth you are comparing a Showroom floor with white marble or glass contrast relfecting and a complete different lighting schematic to your tub alcove. There is some solice in lighting. This is repeated on these forums time and again. Stone itself comes in dye lots and VERIES drastically. Stone wicks moisture, from thinset substrate and grout as it cures it gets darker before it lightens. Some thinsets can take 30 days to fully cure, some portland grouts do normalize over 7-10+ days. and there is a dozen things that can go wrong with hand mixed and installed grout. I cannot see close enough the details of your install but I can tell you I have had to watch sales people at tile shops like a hawk in that they are usually not a person to take advise from. Can you be 100% certain they sold you the proper color/brand or did they sell you something similar to sell you something. ? You should have more recourse if you Payed a tile professional to source and purchase the materials themselves grout included and if you have a contract and stayed hands off. One thing homeonwers dont consider when they get involved with these things is the importance of putting all the liability in the contractors hands to afford recourse. People that do the shopping finding deals choosing materials, and then hiring labor have little to no recourse so i hope thats not you.. I suggest further patience and see how it lightens, play with lighting and start to focus on other aspects of your room..

"I just figured that the creative types on Houzz would have coloured grout and may have some first hand experience. " I do and did. I just gave you a link to an actual grout that can be mix matched to ANY paint color only doing it properly and eliminating risk of mixing paint in a grout its not meant to mix with! perhaps you didnt look at the link.- best

Ok so, so sorry but here: Master- 1) Lay-out is awful. You shouldn't have that small tile at the inside (a pro balances the lay-out prior to install). Yes your concerns regarding uneven and improper slope are valid. Pretty basic standard for tile installation, especially on a shower floor where proper pitch to drain is imperative. Being concerned about the damage occurring from tearing it out is a mute point as you will have major issues as it is. 2) As others have stated, that should be caulk and always caulk at change of planes, not grout. And no, it isn't common for professionals to install on a surface that isn't plumb and flat. If either the general or the tile contractor do not shim and level to prepare for tile, then standards are being ignored and you have a problem. It's poorly done. 3) That is the very cheapest drain assembly available (if it was speced and this was a very low end build, then maybe that was to be expected but as a customer you should be aware of the quality of the product being used). Very unprofessional job around the drain. It should be cut so nicely around the drain that you don't even notice the grout. It is definitely not an "average job". In the tile world, we would call it a "hack job". Guest - 1) Multiple possibilities for the grout pinholes, all related to skill and craftsmanship. Could you dab grout in those places and hope it looks a little better? If you bought a new car would you ask them to fix the paint or dents before you drove it off the lot? You shouldn't need to do patch work on something new. 2) Caulk but remove grout first. 3) Caulk and color match, not clear. Clear is a bad idea there. Now, I'm sorry if we sound harsh. It's an exciting time to move into a new home. If consumers do not hold the builders to basic standards, there will continue to be builders that take short cuts and perform sub-standard work. ALL builds should adhere to basic standards and there is no excuse for what you are seeing. (I hate to say it but I'd be concerned about the methods used to build and waterproof the wet areas, what you can't see, based on what you can see). One place to start is to ask your contractor to document how all aspects of the tile work conform to TCNA industry standards.