Red, Orange, Yellow, Green, Blue, Indigo, Violet
Waves too long for the eye to detect: Infra-red light Waves too short for the eye to detect: Ultraviolet light
The visible light wavelengths are 400 - 700 nm.
The visible spectrum is specified as VIBGYOR. It frequency ranges from 8 x 1014 Hz to 4 x 1014 Hz.
It is a little triangle and if you hold a white light to it, it seperates the light into the 7 colors.