colour.plotting.diagrams.plot_spectral_locus(cmfs='CIE 1931 2 Degree Standard Observer', spectral_locus_colours=None, spectral_locus_labels=None, method='CIE 1931', **kwargs)[source]

Plots the Spectral Locus according to given method.

  • cmfs (unicode, optional) – Standard observer colour matching functions defining the Spectral Locus.

  • spectral_locus_colours (array_like or unicode, optional) – Spectral Locus colours, if spectral_locus_colours is set to RGB, the colours will be computed according to the corresponding chromaticity coordinates.

  • spectral_locus_labels (array_like, optional) – Array of wavelength labels used to customise which labels will be drawn around the spectral locus. Passing an empty array will result in no wavelength labels being drawn.

  • method (unicode, optional) – {‘CIE 1931’, ‘CIE 1960 UCS’, ‘CIE 1976 UCS’}, Chromaticity Diagram method.

Other Parameters

**kwargs (dict, optional) – {colour.plotting.artist(), colour.plotting.render()}, Please refer to the documentation of the previously listed definitions.


Current figure and axes.

Return type



>>> plot_spectral_locus(spectral_locus_colours='RGB')  
(<Figure size ... with 1 Axes>, <matplotlib.axes._subplots.AxesSubplot object at 0x...>)