![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/b/ba/PlanckianLocus.png/640px-PlanckianLocus.png&w=640&q=50)
Chromaticity
Specification of color hue and saturation / From Wikipedia, the free encyclopedia
For the album by Tony MacAlpine, see Chromaticity (album).
Chromaticity is an objective specification of the quality of a color regardless of its luminance. Chromaticity consists of two independent parameters, often specified as hue (h) and colorfulness (s), where the latter is alternatively called saturation, chroma, intensity,[1] or excitation purity.[2][3] This number of parameters follows from trichromacy of vision of most humans, which is assumed by most models in color science.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/b/ba/PlanckianLocus.png/640px-PlanckianLocus.png)
![3D Chromaticity Diagram of the WideGamutRGB color space](http://upload.wikimedia.org/wikipedia/commons/thumb/c/cc/3D_Chromaticity_Diagram_WideGamutRGB.svg/640px-3D_Chromaticity_Diagram_WideGamutRGB.svg.png)