##  [Hue Angle (H°)](/index.php/hue-angle-hdeg) 

  ##  [Hue Angle (H°)](https://health.quantumdictionary.io/hue-angle-hdeg-0) 

  

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**Health & Life Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A colorimetric parameter derived from chromaticity coordinates (commonly a* and b* in CIELAB) that expresses the sample’s perceived hue as an angular position on the chromatic plane, conventionally calculated with an atan2(b*, a*) function and reported in degrees (H°); it indicates dominant hue direction but conveys no information about lightness or chroma magnitude on its own.