The first space I ever added pattern to was my laundry room. It wasn’t even really a room—more like a closet with my washer and dryer in it—but the joy that it brought me was immediate. I added a ...

The geometric pattern of the tile in this Mountain View bath, left, is accented with a contrasting grout color to add visual interest. Subway tiles, right, provide a classic look. Photo by Agnieszka ...