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