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Hue is a term used in color theory to refer to the dominant wavelength of light that is perceived by the human eye. Hue is often described using color names such as red, orange, yellow, green, blue, or purple. In art, hue is an important element of color, and can be used to create a wide range of emotional and psychological effects. The study of hue is an important part of color theory and can provide artists with a deeper understanding of how to use color effectively in their work.