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Color, or colour  is the visual perceptual property corresponding in humans to the categories called red, blue, yellow, etc. Color derives from the spectrum of light distribution of light power versus wavelength interacting in the eye with the spectral sensitivities of the light receptors. 
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Red --- 620- 750 nm and frequency is 400-484THz.......... blue --- 450-495 nm and frequency is 606-668 THz..... green -- 495-570nm and frequency is 526-606 THz
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