Approximate wavelength and frequency ranges for the various colors

Color Wavelength (nm) Frequency (THz)
Red 780 - 622 384 - 482
Orange 622 - 597 482 - 503
Yellow 597 - 577 503 - 520
Green 577 - 492 520 - 610
Blue 492 - 455 610 - 659
Violet 455 - 390 659 - 769