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Hue refers to the gradation of color within the optical spectrum, or visible spectrum, of light. Hue may also refer to a particular color within this spectrum, as defined by its dominant wavelength. A color is defined by the central tendency of the light wave's wavelength. For example, a light wave with a central tendency within 565-590 nm will be yellow.

See also: HSV color space

Hué is a city in Vietnam.