Amazing Color Changing Mood Nail Polish. Mood nail polish will change color when heated to 91 degrees Fahrenheit. Your normal body temperature is 98.6 degrees but your fingertips are slightly cooler. An elevation in body temperature, for example: running your hands under warm/hot water, going outside in hot weather, or even mood changes, will cause the nail polish color to change.
The colors will continue to change back and forth as your body temperature changes. Don't just take our word for it, take a look here!