What is your counter top?

Our guest bath has the curb cut from the granite slab used for the vanity top.

Not a pro but I would say the floor tile for a small bath.

Usually, for the curb you want a full piece. We used a quartz piece that matched the color of the shower floor and wall.

the subway tile (wall tile).

As others have written, shower curbs are generally made with some form of solid surface and most people use a piece of whatever solid surface was used for their counter. Therefore the issue of matching never arises since presumably the counter matches the other finishes in the room.

However I would match the floor tile in terms of it complementing the floor tile as most people would want as little a visual break in the flooring as possible. You can probably get a nice remnant inexpensively from any stone yard or your installer or designer. You could bring your floor tiles to see which looks the most visually seamless.

It would be the wall tile on the curb face. Viewing your posted photo. The problem you have is your shower construction is a failure already. It is IMPOSSIBLE to attach cement board to the curb without puncturing the waterproof liner. Which is also done incorrectly. We should be seeing the liner coming up the sides of the curb to a height of 3" above the finished curb. You have no liner there at all. Cement board needs to be fastened every 8". It clearly is not in your photo. With the visible lack of knowledge one would presume there is not a preslope below the liner and it is laid flat on the subfloor which would be another failure.

Sorry. I only point this out to save you thousands of dollars. What has been done needs to be ripped out and properly replaced by a professional. There is no repair at this stage.

thank you, i told him but he said there was a reason he had to do it like that- ??? appreciate your help

Think design live my counter top is

looks dark in pix it is much lighter than it appears

The reason is he does not have the knowledge to properly construct a shower. What do I see coming next? He will tell you he is going to cover everything with liquid waterproofing. Problem is you can't use a liner and a topical membrane together. It is one system or the other. Using both will create a mold issue.

it is in your best interest to stop NOW and tear that all out. Listen to CTEC please. The bucket of simple set tells the rest of the story.

The product bucket Mint Tile pointed out can not be used on shower floors or over a waterproof membrane according to Custom manufacturers limitations. Perhaps your installer does not intend to waterproof your shower.

The big red flag here is no professional tile setter that I have ever met would use a premixed adhesive in a wet area. pdedona we are not criticizing. We are simply pointing out facts in hopes of preventing another homeowner disaster. Your home, your decision. We hope you choose wisely. Good luck.

i will talk to him about all that you said- i do not understand any of it lol. i know that rubber was laid - wire put down and cement on top and then tile will be laid- I am not sure what you are saying about waterproof membrane? Can you be more explicit. But i am sure if i question him he will understand. Thank you again for all of your imput and warnings etc.

At this point it is more than just waterproofing or a lack thereof. The curb is built incorrect. The cement board is installed wrong. The setting material on the floor (bucket of mastic) is the wrong material if he is using that in the shower, etc, etc.