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Saturation
========
Usage: `saturation(amount)`
Description
-----------
This filter increases or decreases the image saturation.
Arguments
---------
- ``amount`` - :math:`-100` to :math:`100` - The amount (in %) to change the image saturation. Positive numbers increase saturation and negative numbers decrease saturation.
Example
-------
.. image:: images/tom_before_brightness.jpg
:alt: Picture before the saturation filter
`<http://localhost:8888/unsafe/filters:saturation(40)/https%3A%2F%2Fgithub.com%2Fthumbor%2Fthumbor%2Fraw%2Fmaster%2Fexample.jpg>`_
.. image:: images/tom_after_positive_saturation.jpg
:alt: Picture after positive saturation
`<http://localhost:8888/unsafe/filters:saturation(-40)/https%3A%2F%2Fgithub.com%2Fthumbor%2Fthumbor%2Fraw%2Fmaster%2Fexample.jpg>`_
.. image:: images/tom_after_negative_saturation.jpg
:alt: Picture after negative saturation
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