So I had a bathroom with Carrera Porcelain Tile (marble pattern with whites and greys) and a dark grey slate floor.  At first I got the light grey/grey stripe combination, but after I looked at in the light for a day or two, the lighter stripes looked almost taupe/light tan.  I then ordered the silver stripes on white and was MUCH happier as the white in this pattern looks better whiter porcelain and grey accents.