More ideas from Juan
color changing tiles! This is the only shower image I could find. These are the "northern lights" style, which are dark at room temp and move through the color spectrum as they warm. Go here to see other style options, in many colors. http://www.movingcolor.net/products.html

Color Changing Tiles - Turn your shower into a living hotbox, or at least pretend like it by installing these heat sensitive tiles on the walls. Stand in awe the next time you shower as they react to the heat and slowly change colors. for-the-home