Have you inherited a floor with oddly colored grout? Is your grout too gross to deal with? Did you make a grout choice that was a disastrous design decision? Have you accidentally tried to clean your grout with bleach and bleached the color out? Good news! The tile is difficult and expensive to replace, but you can change the whole look of a tile floor with new grout.
If you think you might like the color, but can’t tell what it originally started as:
If you inherited a color that is just too difficult to deal with: