Information AboutHue |
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A 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 , or the central tendency of its combined wavelengths. For example, a light wave with a central tendency within 565-590 Nm will be Yellow . In Painting Color Theory , a hue refers to a ''pure'' color —one without added white ( Tint ) or black ( Shade ) Pigment . In an RGB Color Space , hue can be thought of as an Angle ''φ'' in standard position. To calculate ''φ'', let ''R'', ''G'', ''B'' be the color coordinates in RGB space, defined on a scale from zero to one. Then, after obtaining the Brightness ''μ'' and the Saturation ''σ'', the hue could be obtained from : (Compare with Standard Score ). Using this formula, ''φ=0'' (in Radian s) would correspond to red, while ''φ=2π/3'' would correspond to blue, and ''φ=4π/3'' would correspond to green. The RGB coordinates should be derivable from the ''μ'', ''σ'', ''φ'' coordinates as follows: : : : Hue is a coordinate (an angle of rotation) in HSL Color Space and HSV Color Space . EXTERNAL INFO See also: |
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