This package provides a Python library that calculates the contrast ratio of colors based on Web Content Accessibility Guidelines (WCAG) 2 standard, published by the Web Accessibility Initiative (WAI). The actual WCAG technical documents are created by the Accessibility Guidelines Working Group (AG WG), which are part of the WAI.

This library also provides some checking if contrast meets the required level.

This package contains the Python 3 version of the library.