Color Changing Tiles Bathroom. “Northern Lights Tile”. Tiles appear black at room temp, but move through the color spectrum when the temperature changes. Watch your shower explode with a rainbow of color after you install these heat sensitive color changing tiles. Available in many different colors and styles, these groovy color changing tiles are perfect for a shower, a drink coaster, or anywhere temperature fluctuates. If there’s one way to design your home so that you can display how much better you are then everyone else, it’ll be in the master bathroom.