(Note that using spray paint outdoors and wearing a mask and proper safety gear is recommended.) For larger projects, or for places like bathrooms, a brush-on version might be a better option.

American designer Joe Doucet has developed a pigment that changes color, depending on the temperature. It could be a game changer for people living in the world’s temperate zones.

American designer Joe Doucet has developed a pigment that changes color, depending on the temperature. It could be a game changer for people living in the world’s temperate zones.