Efficient WCAG Contrast Checker for Web Development

The WCAG Contrast Checker is a Firefox extension designed for web developers to ensure compliance with accessibility standards. This tool evaluates the color contrast of all elements on a webpage, taking into account their computed styles, including color and background-color CSS properties. It also accommodates RGBA values by factoring in opacity, providing a realistic assessment of color visibility.

Additionally, the extension features manual input fields for users to test specific color combinations. It automatically refreshes to reflect changes in the DOM, such as the addition or removal of elements, although this feature can be deactivated during extensive modifications. This ensures that developers can maintain an accessible user experience without compromising on design.

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App specs

  • License

    Subscription

  • Version

    3.8.4

  • Latest update

  • Platform

    firefox

  • Size

    170.77 KB

  • Developer

    • Rumoroso

Program available in other languages



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Laws concerning the use of this software vary from country to country. We do not encourage or condone the use of this program if it is in violation of these laws.
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Score result: Clean

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Saturday, September 13, 2025
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File Integrity

File
3.8.4.xpi
SHA256
ea6f303ddc17270c0c6cd237a717d20a0269cd468fc43227b626975eeb6fe8d8
SHA1
ad918d30754ba7c7376ac97fdb042fb54ea793b9

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WCAG Contrast checker has been thoroughly scanned by our advanced security systems and verified by industry-leading partners. This file comes from the official developer and has passed all our security checks, showing no signs of viruses, malware, or spyware.