Keep in mind, depending on what color you’re changing to you may need more than one coat. Keep in mind that you can really only go from light to dark when changing color. How To Whiten Tile Grout - Or Change Grout Color - Easy Diy Grout Grout Renew Tile Grout It’s essentially paint for your grout. Change grout color on tile . Bathroom tile is white and grout is white. Select a color grout that contrasts with the tile color to make each tile stand out. This will remove any built up, oils, and old sealers from your grout. If you do need to change the color of the grout, you can purchase penetrating stains that are nearly identical to wood stains. Start off by cleaning your tiles thoroughly and then take the time to sand them. Deep clean grout first to expose original color; Sanding the tile will help the pigment bond to it once you add it. Start by using the grout cleaner. After a day or two, your grout will be fully dry, and you can see the finished color. ...