Simple WCAG Contrast Checker by HardaWebPro

Simple WCAG Contrast Checker helps developers, designers, QA teams, and accessibility reviewers find visible text on the current page that may not meet WCAG color contrast requirements.

Open the add-on on any supported http or https web page to scan visible text, highlight elements that fail the selected WCAG standard, and review a summary list of issues. Click a highlighted element or a summary item to inspect foreground and background colors, view the current ratio, and test alternate colors with a live editor and custom color picker.

Features include:
- Automatic scan for visible text contrast failures
- Switch between WCAG AA and AAA checking
- Visual overlay highlights with ratio labels
- Issues summary with click-to-inspect navigation
- Live foreground and background color editor with custom color picker
- Copy CSS selector for the selected element
- Copy foreground or background hex values from the inspector
- Rescan after page changes
- Persistent panel state and layout preferences
- Keyboard-friendly close with Esc

This add-on checks color contrast only. It does not certify full WCAG compliance, perform a full accessibility audit, or represent official W3C endorsement.