Colour Contrast Analyser

The Colour Contrast Analyser (CCA) helps you determine the legibility of text and the contrast of visual elements, such as graphical controls and visual indicators.

This tool provides two useful core functionalities:

  1. a pass/fail assessment against WCAG 2.0 color contrast success criteria
  2. a simulation of certain visual conditions, including dichromatic color-blindness and cataracts, to demonstrate how your web content appears to people with less than 20/20 vision

The CCA is available for Windows and Mac, and in multiple languages including English, French, Dutch, Italian, German, Hindi, Korean and traditional Chinese. Note: the visual simulation functionality is only available in the Windows version.

Acknowledgements

The Colour Contrast Analyser was developed by JUn in collaboration with Steve Faulkner (The Paciello Group, Europe). Mac version developed by Cédric Trévisan (The Paciello Group, Europe).

A prior version of the CCA was partially funded by the Trace Research and Development Center as part of the NIDILRR Funded Rehabilitation Engineering Research Center (H133E030012)

Contribute

To report bugs, suggest improvements or contribute to the code:
GitHub: Colour Contrast Analyser (CCA)