ThePacielloGroup/CCA-Win

Contrast Ratio Rounding Difference Between WAT CCA and Windows CCA

Closed this issue · 2 comments

jgauvreau commented

My team noticed slightly different color contrast calculations depending upon if they were using the Colour Contrast Analyser (CCA) launched from the Web Accessibility Toolbar (WAT > Colour > Contrast Analyser [application] option) versus downloading and installing the standalone Windows version of CCA.

For example if you enter the following HEX color codes Foreground:#444444 Background:#AFAFBB:

  • The Windows stand alone version of the CCA calculates and displayed a Contrast ratio of 4.49:1
  • The WAT version of the CCA calculates and displays a Contrast ratio of 4.5:1

Can the CCA Windows stand alone version be updated to round the result to one decimal place to be consistent with the results other developers/tester might see using the WAT version of CCA?

patrickhlauke commented

Confirmed. I seem to remember at some point this difference was introduced (either in the WAT or standalone version).

patrickhlauke commented

The latest version of CCA standalone in #14 (which we'll release properly soon) addresses this now.

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