A method of selecting color of tile grout providing at least one partially transparent card having a first color band thereon, placing the card over an array of tiles with the color band generally overlying the grout and visually comparing the first color band and the tile color to facilitate selecting a grout color. A second color band oriented angularly with respect to the first band may be employed so as to provide a pair of color bands overlying the intersecting grout areas. Corresponding sets of cards are disclosed.