colour.temperature.xy_to_CCT_Hernandez1999¶

colour.temperature.xy_to_CCT_Hernandez1999(xy)[source]¶

Returns the correlated colour temperature \(T_{cp}\) from given CIE XYZ tristimulus values xy chromaticity coordinates using Hernandez-Andres et alii (1999) method.

Parameters:	xy (array_like) – xy chromaticity coordinates.
Returns:	Correlated colour temperature \(T_{cp}\).
Return type:	numeric

References

[HernandezAndresLR99]

Examples

>>> xy = np.array([0.31270, 0.32900])
>>> xy_to_CCT_Hernandez1999(xy)  
6500.7420431...