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Visible Light Spectrum

I went with the mnemonic I learned long ago, ROY G. BIV, to represent the colors red, orange, yellow, green, blue, indigo, and violet. Some sources state that indigo is no longer accepted, some include cyan, and some include neither, but I like the seven-color representation shown here.

Visible light spectrum

Color Wavelength (nm) Frequency (THz)
Red 620-750 400-484
Orange 590-620 484-508
Yellow 570-590 508-526
Green 495-570 526-606
Blue 450-495 606-668
Indigo 420-450 668-720
Violet 380-420 720-789