visible light which has a wavelength of between 380 nm and 760 nm is usually
Electromagnetic spectrum Electromagnetic radiation with a wavelength between 380 nm and 760 nm (400–790 terahertz) is detected by the human eye and perceived as visible light. Other wavelengths, especially near infrared (longer than 760 nm) and ultraviolet (shorter than 380 nm) are also sometimes referred to as light, especially when the visibility to humans is not relevant. White light is a combination of lights of different wavelengths in the visible spectrum. Passing white light through a prism splits it up into the several colors of light observed in the visible spectrum between 400 nm and 780 nm.
Cyan Cyan (/ˈsaɪ.ən/[4] or /ˈsaɪ.æn/[5]) is a greenish-blue color.[6][7] It is evoked by light with a predominant wavelength of between 490–520 nm, between the wavelengths of blue and green.[8]