Install libghc-colour-doc by entering the following commands in the terminal:
sudo apt update sudo apt install libghc-colour-doc
Description:
A model for human colour/color perception; documentation
This package provides a data type for colours and transparency. Colours can be blended and composed. Various colour spaces are supported. A module of colour names (Data.Colour.Names) is provided. . This package provides the documentation for a library for the Haskell programming language. See http://www.haskell.org/ for more information on Haskell.
Homepage: http://www.haskell.org/haskellwiki/Colour
Version: 2.3.4-1
Section: universe/doc