According to the search results, red light is the best color light to help with sleep. Red light increases the production of melatonin, which is a hormone that helps you mentally and physically relax while you drift off to sleep. Red light has a lower color temperature than regular sunlight, making it ideal for sleep. Other warm hues of red, orange, and yellow are also better for preparing the mind and body for sleep. In contrast, blue light is not suitable for lighting a bedroom as it throws off the sleep cycle and decreases the production of melatonin. Blue light is also found in electronic devices such as smartphones, tablets, and desktop screens, which should be avoided at night. Dim yellow and orange colored lights have little impact on the circadian rhythm and are good options to use at night.