Light is made up of several different colors. Each of these colors has a corresponding wavelength and energy. Red light has the lowest energy, followed by orange, yellow and so on. This energy gradually increases through the spectrum. This means that the blue color, which is at the opposite end, has the highest energy among all the colors of visible light. Next to the blue wave is the ultraviolet (UV) light which can be harmful in many ways.
Since blue is already near the edge of visible light, its frequency is already very close to UV light. If you only get minimal exposure, blue light will not really affect you that much. But if you spend a lot of time using computers, cell phones and tablets, this article should serve as a wake-up call. You need to have some kind of protection to keep yourself safe from the possible damages caused by blue light.