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Color Charts & Graphics
Visible Wavelengths
(potentially misleading)
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Additive Color Mixing
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Subtractive Color Mixing
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The figure shows the visible spectrum roughly as it appears in sunlight reflected from a diffraction grating (such as a compact disc), which produces an equal spacing of light wavelengths. Notice the very gradual falloff in luminosity at the near infrared (IR) end of the spectrum, and the relatively sharper falloff toward ultraviolet (UV). In fact, the boundary on the infrared side varies with light intensity: infrared up to 1000nm is visible if the light source is strong enough and viewed in complete darkness.
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The original "color circle" (1704) superimposed on the spectral and extraspectral hues
(there is no "magenta" or "purple" light in the spectrum); applies only to light, not pigments
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