Accessible Web Color Contrast Checker
Checks color pairs against WCAG contrast thresholds for text and UI.
Accessible Web’s Color Contrast Checker is a free browser-based tool for testing foreground and background color combinations against WCAG contrast requirements. It reports the contrast ratio and pass/fail results for AA and AAA levels across small text, large text, and non-text interface components.
Why it stands out
- Separates results by practical WCAG use case instead of giving only a single pass/fail score.
- Includes non-text UI component checks, not just text contrast.
- Makes WCAG threshold requirements visible alongside the tested color pair.
- Connects the quick checker with a Chrome extension for testing colors directly on live pages.
Good to know
- A passing contrast ratio does not guarantee the whole visual design is accessible; states like hover, focus, and animation still need review.
- The page-level checker tests selected color pairs rather than scanning an entire site workflow.
- Broader scanning, remediation, reporting, and team features are part of Accessible Web’s separate RAMP platform/trial.
Under the radar: Use the reverse-colors option when checking buttons or badges that invert foreground and background colors on hover or focus, since those states can fail even when the default style passes.
Photos
Web designers and front-end developers can quickly verify brand or interface colors before shipping accessible layouts. Check whether body text, headings, buttons, and icons meet WCAG AA or AAA contrast targets. Compare a foreground/background pair using hex codes or the built-in color picker. Validate alternate states such as reversed color treatments before adding them to a design system.
Hex color input and color picker controls; automatic contrast-ratio calculation; AA and AAA results for small text, large text, and UI components; foreground/background reversal; reference notes for WCAG contrast thresholds; links to Accessible Web’s broader accessibility tools and Chrome extension.
Alternative listings
A free desktop checker for WCAG color contrast in visual designs.
Accessibility & assistive technology resourcesColour Contrast Analyser is a free Windows and Mac app for testing foreground and background color combinations against WCAG contrast requirements. It can sample colors from the screen, accept pasted color values, preview text and non-text contrast, and simulate several types of color vision deficiency.
0 votesVisit siteTools for finding accessibility issues in web and Windows apps.
Accessibility & assistive technology resourcesAccessibility Insights is a Microsoft accessibility testing project with a browser extension for Chrome and Microsoft Edge and a Windows desktop app. It helps developers find common accessibility problems, inspect UI properties, check color contrast, and review coverage against WCAG 2.1 AA guidance.
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Similar sites elsewhere
- WebAIM Contrast Checker — webaim.org/resources/contrastchecker/
- TPGi Colour Contrast Analyser — tpgi.com/color-contrast-checker/
- Contrast Checker — contrastchecker.com
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