wcag-contrast-ratio
A library for computing contrast ratios, as required by WCAG 2.0
.
Usage
Simple usage follows this pattern:
.. code-block:: python
import wcag_contrast_ratio as contrast
black = (0.0, 0.0, 0.0)
white = (1.0, 1.0, 1.0)
contrast.rgb(black, white)
21.0
Two useful helper functions are provided, to check if contrast meets
the required level:
.. code-block:: python
import wcag_contrast_ratio as contrast
contrast.passes_AA(21.0)
True
contrast.passes_AAA(21.0)
True
.. _WCAG 2.0: http://www.w3.org/TR/WCAG20/