First off here s a look at the gray grout i chose i went with a light gray option called frost.
White marble tile with light grey grout.
Gray grout will emphasize the dramatic gray veins that mimic real carrara marble while the white grout will the porcelain floors light bright and elegant.
Same 1x3 marble tile diffe grout color wow what a white marble hexagon tile with grout carrera floor gray and white marble kitchen reveal maison de pax tech silverado grout color pebble shower floor marble that hampton carrara marble backsplash done zo chris loves julia marble hexagon with mapei silver grout images master bath.
The grey blends seamlessly.
In the bathtub i continued with the same light grey grout with white subway tile.
Grout color for carrara marble banyo carrera marble tile floor white carrera marble tile in shower tech silverado grout color pebble that hampton carrara marble backsplash grout color with carrara bianco marble.
Use a non sanded grout to protect both the marble and the grout from discoloring too much.
Depending on the color of grout used the look of carrara pietra porcelain tile can vary once installed.
A light or white grout with the marble is actually the most.
White grout is a risk in bathrooms though as everyone mentions.
This pic shows how the white subway tile and gray grout look in both shadowed spaces underneath the upper cabinet and to the left of it and in a more sunny spot close to the countertop.
The light gray is also a fine choice but keep in mind that it will darken and maybe not match the tile color quite as well over time.