Without getting too technical, all light (and colour) is made up of wavelengths and of those wavelengths, Violet and Blue are the shortest. Due to being the shortest, they interact with our Circadian Rhythm, which is our body’s internal clock and one of the largest factors that can influence either restful and restorative sleep or cause disrupted and unsatisfactory baby sleep.
The reason it causes this effect is that Blue Light suppresses the production of Melatonin, the hormone which makes us sleepy. That’s not to say that all exposure to Blue Light is bad, we require this exposure during the day to keep our bodies awake and working correctly! However, with babies and young children who require naps, it’s a fine balance.

Blue light can be found in the sunshine (along with Vitamin D, which if you haven’t read our blog about it can be found here) which helps to promote sleep quality if exposed at the right time of the day. However, we can also get an artificial blue light on our devices with screens and even from some LED light bulbs. Some items such as night lights and the popular gro clock produce blue light! We recommend parents always check for whether an item uses blue light when you are buying baby nursery decorations or nursery accessories- or anywhere baby sleeps!