CSS Colours
===========

This module defines helpers for dealing with CSS colour strings.

The following constants are available:

* **PREDEFINED**: Tuple of the predefined colour literals available in most web 
    browsers
* **HEX_MATCH** : Compiled regular expression for HEX CSS colour values such as 
    #F1A or #AB4CD9
* **RGB_MATCH** : Compiled regular expression for rgb function calls such as 
    rgb(0, 12, 255)
* **RGBA_MATCH**: Compiled regular expression for rgba function calls such as 
    rgba(0, 12, 255, 0.3)
* **HSL_MATCH**: Compiled regular expression for hsl function calls such as 
    hsl(120, 5%, 200%)
* **HSLA_MATCH**: Compiled regular expression for hsla function calls such as 
    hsla(120, 5%, 200%, 0.3)

.. automodule:: awl.css_colours
    :members: