I do not like white grout anywhere and I do not care that people think it does not discolor becuase it does. In your case I would use matching grout to the tile floor .

How about Platinum, Cape Gray, Delorean Gray, or Steel Blue?

Matching or dark gray grout on the floor.

White grout on the walls.

I have gray grout on my shower floor (gray tile) and white on the shower walls (white tile). It's OK if they're different.

There are different version of grout; you could go all the way to an epoxy version. Just check with installer that he knows how to use them.

White epoxy grout will yellow with age. Otherwise I’m a huge fan of epoxy grout in showers.

ive seen epoxy and urethane grout shrink or separate and leavd gaps. sand grout can be scrubbed as well as regrouted, if needed I've gad no luck with sealers.

Agree that white grout is a pain to clean, here is mine after only 2 months. I specified grout to match shower floor tiles and I recommend you match your shower floor tiles.

Agree that matching the tiles is best and it’s ok if the grout on the floor doesn’t match the grout on the wall. If you’re getting white for the walls, ask if you can get epoxy or another stain resistant grout. At the very least use a good sealer. Don’t do white on the floor.

I have epoxy grout in a shower remodeled about 13 years ago. It is totally bombproof, no discoloration, no scrubbing or staining, no yellowing. I love it! I just had a new bath redone and had them use epoxy. It's a very pale grey with a blue hex and I love it and the ease of care.

I probably would not use white grout on your tile floor. It will emphasize the pattern too much, instead of the great color. Use something close to the color of the tile or at least with less contrast than white would have.

Light gray is best. I have a bathroom renovated in the 90s with all white tile on walls and floor. Light gray grout on the floor tile, and it still looks new. Anyone seeing the bathroom would think it was done 2 or 3 years ago. Use quality tile and competent workmanship and it will look great for years to come.

Match the grout on the walls.

Thank you for all the helpful information! A lot of good points were made that I never even thought about. I think I will either go with a gray grout or try to match the tile with a blue. Thanks everyone!!

Update: here are the grout samples

would you choose the blue or gray grout for the blue tiles?

Note: “Wite” is meant to say “White”

I like:

• Left: #643 Warm Gray
• Center: #642 Ash
• Right: #115 Platinum

I think the darker grout looks better with the blue

As someone else said - the grout will discolor. If you use white grout you will be cleaning it often to maintain the color and, even then, it will still discolor.

The blue grout seems to disappear which is a good thing. That being said it is difficult to determine whether the blue is a good match for the tiles. You need to determine that in person.

I like Mapei Silver & #643 Warm Gray. The blue grout looks like a total mismatch on my screen.

I love that floor tile. More info on it?

@ci_lantro I agree, the blue grout is not the right color blue for the tile. Re: floor tile, the floor in the picture in the unfinished concrete floor, ha! However, I am using Basic Cement Silver Porcelain Tile (Tile Bar) which is the same thing as Ivy Hill Essential Cement Silver Tile Porcelain (Home Depot) to tile the floor, and it looks very similar to concrete. The floor tile is actually the backing for the samples, so you can see that it is a silvery cement looking tile.

I was curious about the shower floor tile.

@marylut you look to have a bigger problem than dirty grout. Have you posted your floor in any of the forums asking what is going on? It looks like it is not draining properly and all that dark is moisture under the tile not just dirty grout. (sorry for the hijack schmoo)

@ci_lantro ooooh, okay got it. The shower floor tile is the Aegean color 2" by 2" tiles from Zia tile. As a heads up, I got in a huge dispute with Zia tile over how difficult it is to install 2" by 2" tiles on a shower floor. Prepare to have a significantly higher labor charge than expected because the tiles are not appropriately spaced on the backing and have very sharp edges, so it's a lot of extra work for your tile person.