10 Best Color Contrast Checkers for Accessibility

Colour contrast is easy to overlook when a design looks attractive on your own screen. This guide is for designers, developers, small-business owners, and anyone responsible for readable websites or documents.

These tools can identify many low-contrast combinations, but a passing result does not make an entire site accessible. Check real text, focus states, images, and usability with people and assistive technology.

Quick picks

• Best overall: WebAIM Contrast Checker — a clear manual check for two colours.
• Best for understanding impact: Who Can Use — shows how contrast affects different vision conditions.
• Best desktop option: TPGi Colour Contrast Analyser — sample colours from screen content.
• Best in-browser workflow: axe DevTools — find issues during page testing.

How we picked

We favoured tools that explain their results and fit different stages of design and development. Contrast checking is one part of an accessibility review, not a complete audit.

• Can it test foreground and background combinations clearly?
• Does it support a real page or only entered values?
• Are results understandable to a non-specialist?
• Can it fit into regular design or browser testing?

Simple colour checks

1. WebAIM Contrast Checker

WebAIM Contrast Checker accepts foreground and background colours and reports contrast against WCAG text criteria. Its uncluttered results make it a strong first stop for a proposed text colour. You must know or enter the colours yourself, so it will not discover every issue on a complex page. Free.

Best for: anyone who needs a quick, understandable check on a planned text pairing.

2. Accessible Colors

Accessible Colors lets users enter colour values and explore whether text combinations meet contrast requirements. Its straightforward setup makes it approachable during early palette work. It tests the chosen pairing rather than the whole interface, so gradients, transparency, and changing backgrounds need separate attention. Free.

Best for: designers adjusting a palette while keeping a specific foreground and background in view.

3. Contrast Ratio

Contrast Ratio provides a compact way to enter two colours and compare their contrast result. The stripped-back interface is useful when you want a quick answer without a larger accessibility suite. It offers little guidance about the rest of a page, and users still need to understand which text standard applies. Free.

Best for: experienced designers who want a fast check while refining exact colour values.

4. Who Can Use

Who Can Use pairs contrast results with simulations illustrating how colour combinations may appear to people with different vision conditions. That broader framing helps explain why a numeric score matters in everyday use. Simulations are informative rather than a replacement for user testing, and the page remains a manual pair-by-pair tool. Free.

Best for: teams explaining contrast decisions to stakeholders who need visual context.

Check designs and live pages

5. TPGi Colour Contrast Analyser

TPGi Colour Contrast Analyser is a desktop utility that can sample colours from screen content, reducing guesswork when checking an existing design or website. It is handy when colour values are not readily available. Sampling can be affected by gradients, anti-aliasing, or transparency, so inspect the actual rendered text carefully. Free.

Best for: auditors and designers who need to sample colours directly from the screen.

6. Stark

Stark offers accessibility features in design and development workflows, including contrast checks and related review tools. It can help teams catch colour issues closer to where mock-ups and interfaces are made. Some capabilities are part of a paid product, and a plugin's feedback should be followed by testing the finished experience. Free plan with paid upgrades.

Best for: design teams that want accessibility checks alongside their existing creative workflow.

7. Polypane

Polypane is a browser for web developers with accessibility inspection features, including contrast-related checks on pages. Its multi-view approach can also help examine layouts at different viewport sizes. It is a broader professional browser rather than a tiny standalone checker, which may be more than a casual user needs. Paid, with a free trial.

Best for: developers reviewing responsive websites and accessibility in one browser workspace.

8. axe DevTools

axe DevTools brings automated accessibility checks into browser-based development, helping identify issues such as insufficient text contrast on a rendered page. It is useful for repeatable checks as a site changes. Automated findings cannot cover every context or replace manual review, and some features require a paid plan. Free tools with paid upgrades.

Best for: web developers who want contrast findings as part of routine page testing.

9. Chrome DevTools

Chrome DevTools includes accessibility inspection within the browser's developer tools, making it convenient to investigate a page without adding a separate app. Developers can inspect rendered elements and related contrast information. It is less approachable for a business owner unfamiliar with browser panels, and automated inspection has limits. Free.

Best for: developers debugging a live page while already working in Chrome.

10. Adobe Color

Adobe Color includes accessibility-oriented contrast checking alongside its colour exploration features. That lets a designer consider text readability while shaping a palette rather than waiting until final delivery. It is not a page auditor, and its advice concerns selected colours rather than every component state. Free.

Best for: designers who want contrast awareness during palette exploration.

How to choose the right one

For a proposed pair, use a simple manual checker; for a finished site, add a browser or desktop inspection tool. Test normal text, large text, icons that convey meaning, hover and focus states, and overlays. Do not rely on colour alone to communicate status. Stockio's contrast checker is a convenient starting point, and our colour tools directory has related helpers. See the practical WCAG text contrast guide and automated accessibility testing workflow for the limits of automated checks.

When reviewing a page, remember that a tool may report a strong contrast ratio while the surrounding design remains difficult to use. A colour-only status indicator can still exclude readers, even when its label passes a text check. Pair the colour with text, an icon, or another clear cue. Small text over a photograph, thin type, and colour-coded charts deserve particular attention. Record the combinations you approve so later edits do not quietly undo the decision. Recheck after a redesign. Keep a short record of the reason for each decision, too.

Key takeaways

• Contrast is important, but not the whole of accessibility.
• Test the actual rendered interface, not only palette swatches.
• Include interactive states and meaningful icons.
• Use simulations as context, not proof of usability.
• Combine automated checks with manual review.