Grout color can make a big difference in the appearance of your tile floor or wall. Consider the following when choosing a color for your grout.
Since grout is simply a mix of water, cement, and sand, any color dye can be added to it. You should be able to find a grout color that complements any type of tile. Keep in mind that the final color may be slightly different than that which is advertised. It’s best to test a small patch and allow it to dry before you apply it to the entire surface.
If you need to mix colors to achieve the desired shade, mix enough to cover the entire area. It’s very hard to match a color once it’s been mixed and has dried. You're better off mixing too much.
How to Pick the Color
For a dramatic look, choose a darker color grout to compliment a lighter color tile. If the tile features a splash of color that you like, you can draw it out by using a grout that complements it. For a classic neutral look, choose grout in a light color.