According to multiple sources, the best LED color for sleep is red or amber. Red light has a lower color temperature than regular sunlight, making it ideal for sleep. It stimulates the production of melatonin, a hormone that helps you sleep, and does not make our brains respond so much to its wavelengths, making it the best way to switch from daylight to night without interrupting your sleep cycle. Amber light is also warm and soothing, promoting a good nights sleep. On the other hand, blue light is the worst color for sleep as it throws off the sleep cycle and decreases the production of melatonin. Therefore, it is recommended to avoid white or blue lights in the bedroom. If you have to sleep with a night light on, it is best to choose a red or amber light.