I would suggest he darker for the first one and the lighter for the second one. Always taking into account what area the tiles are going in, the amount of and type of light there will be in that actual space helps.

@Monticello Tile & Stone Thank you! The first tile is in the bathroom. My thoughts were that the lighter grout would make the tiles feel a little more cool as opposed to the darker grout being more warm, but would the lighter grout show more of a contrast/not look as natural?

The second tile is throughout the rest of the house and lighting will vary. I was leaning towards the darker color here because I have read that you should match the darkest colors on the tile to the grout for a more natural wood look.

#1 darker

#2 lighter

These two choices seem to blend in the most with the tile choices which is my preference when it comes to grout. I like to squint a bit and look at the overall tone. You might also try mocking up a grout sample with some extra tiles. Sometimes that's really helpful so you can see how it will actually look with the real / actual grout.

@Simone Novak IMO when the grout color blends it looks best. It seems the first tile will look more like stone and the wood grain porcelain will look more like wood if the grouts blend well. Sometimes it is desirable to contrast grout and draw attention to the joints. It's subjective: personal style, overall desired effect, etc.

@Simone Novak This isn't a color comment so much as it is input from my own recent large-scale grouting and tile project, that you might want to look into whether the grout line you're choosing is pre-sealed. We're scarcely a year into wear on our project and having major issues with Bostik grout staining. I'd look into the Mapei pre-sealed grout or anything from Laticrete. You can seal grout after installation, but it's easier to use pre-sealed grout from the outset. We're going with Laticrete grout for our next tile project. Hope all goes well for you.

On color, grout I think generally tends to look a little lighter once it is installed over a large area, so just keep that in mind. Dirt also tends to collect in the grout lines, so that can add to the darkening effect. These days, tile setters can use special leveling spacers to get very small joints, so you may want to ask for that to help minimize the total area that will be visible as far as the grout.

This is our wood look porcelain tile, we went with a darker grout than we originally planned, it matches the darkest parts of the tile. I love how it blends. Go dark! It always looks lighter when it's installed.

Darker for both. On the first, the color is more complementary. On the second, dark recedes. That lighter will start to stick OUT - which is not what you want.

@itsourcasa Thank you so much! Your wood look porcelain tile is BEAUTIFUL! What size planks are those? I really appreciate you sending me that picture and for yours and @just_janni's input. I am going with the darkest grout for both!

I like the one on the right (top photo) and the one on the bottom. (bottom photo)

@Simone Novak thanks! They are 9x47 planks from floor & decor, we are very happy with our choice.

@itsourcasa they're beautiful! Thanks again!