Colour is an open-source Python package providing a comprehensive number of algorithms and datasets for colour science.

It is freely available under the BSD-3-Clause terms.

Colour is an affiliated project of NumFOCUS, a 501(c)(3) nonprofit in the United States.

Most of the public Colour API is available from the colour namespace.

In [1]:

import colour

For example, computing the CIE 2017 Colour Fidelity Index of a light source can be done as follows:

In [2]:

sd = colour.SDS_ILLUMINANTS.get('FL2')
colour.colour_fidelity_index(sd)

Out[2]:

70.120825477833037

The correlated colour temperature of a CIE Standard Illuminant can be calculated easily:

In [3]:

il = colour.CCS_ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D50']
colour.xy_to_CCT(il, method='Hernandez 1999')

Out[3]:

5001.3574639752351

Colour also implements various plotting functions via to Matplotlib:

In [4]:

colour.plotting.colour_style()

colour.plotting.plot_visible_spectrum();

Sponsors

We are grateful for the support of our sponsors. If you'd like to join them, please consider becoming a sponsor on OpenCollective.