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Color

Characteristic of human visual perception

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Color: Characteristic of human visual perception
Color, or colour, is the characteristic of visual perception described through color categories, with names such as red, orange, yellow, green, blue, or purple. This perception of color derives from the stimulation of photoreceptor cells by electromagnetic radiation. Color categories and physical specifications of color are associated with objects through the wavelengths of the light that is reflected from them and their intensities. This reflection is governed by the object's physical properties such as light absorption, emission spectra, etc.

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Charles Dickens: Black-and-white photos of author colourised

Colour has been digitally added to eight photos to show what the novelist would have looked like.
BBC News - Published

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