Visable light wave length is 0.76 to 0.39 micro meter (uM) including red to violet lights with wave lengths:
Red light - 0.64 to 0.7
Orange light - 0.585 to 0.674
Yellow light - 0.575 to 0.585
Green light - 0.4912 to 0.5560
Blue light - 0.424 to 0.4912
Violet light - 0.4 to 0.424