Low contrast (ex. white tile with warm gray grout) puts visual focus on the tile and creates a harmonized look. Low contrast between the tile and grout color allows the beauty of the tile to stand out.
High contrast between tile and grout color (ex. white tile with black grout) will create a very bold look and can easily become the focal point of a kitchen if used on a backsplash, for example. High contrast between tile and grout color brings attention to the shape and pattern of the tile layout.
Some of the most common grout colors used are listed below:
Brilliant white
Grays - Warm gray, Frosty
Beiges - Mink, Almond
Black
Many tile shops offer assistance in choosing a grout color for those who prefer to look in person.
Low contrast between tile and grout color
High contrast between tile and grout color