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

It is freely available under the New BSD License terms.

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


Colour features a rich dataset and collection of objects, please see the features page for more information.

How-To Guide

The How-To guide for Colour shows various techniques to solve specific problems and highlights some interesting use cases.


The main technical reference for Colour and its API is the Colour Manual.