The grout looks to be either white or a light gray. A light grout color won't necessarily take away from the tile- it will just emphasize the pattern of the tile. If you use a grout color that is very close to the tile color, you won't really notice the pattern and will have a blended look. If you still want a lighter color but are unsure of using white, I would recommend using a grout color that is slightly lighter than the tile. That way it will still emphasize the pattern but will not be too distracting.