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    Color Contrast

    Check contrast ratio for WCAG accessibility. Use Color Contrast free online with no signup, fast results and secure browser-based processing.

    Ratio: 21:1

    Sample text to test readability

    WCAG Compliance

    AA Regular (≥4.5:1)
    Compliant
    AA Large (≥3:1)
    Compliant
    AAA Regular (≥7:1)
    Compliant
    AAA Large (≥4.5:1)
    Compliant

    Color Contrast helps you work with colors directly in your browser.

    The tool is built for designers, developers and creators who need fast, reliable results.

    Supported formats

    HEX
    RGB
    HSL

    How it works

    1

    Step 1

    Open Color Contrast

    2

    Step 2

    Enter or import your colors

    3

    Step 3

    Copy, export or reuse the result

    Common mistakes to avoid

    • Forgetting to check contrast can hurt readability.
    • Using too many colors can make a palette harder to apply.

    Pro tips

    • Keep your main colors as CSS variables.
    • Test your palette in both light and dark mode before publishing.

    Privacy guaranteed: everything is processed locally in your browser.

    Processing happens locally in your browser whenever possible. No account is required.

    Color Contrast for your color projects

    Check contrast ratio for WCAG accessibility.

    Color Contrast without precision loss

    Conversions and calculations run on exact values (HEX, RGB, HSL, OKLCH). No visual approximation: you get the color true to your design intent.

    Color Contrast free online

    No signup, no software download required. Color Contrast is 100% free and works in any browser. The free plan includes 10 uses per day.

    Color Contrast fast and secure

    Processing happens directly in your browser for maximum speed. No data is sent to our servers: your colors and files stay private on your device.

    Color Contrast for sharing and collaboration

    Export your results as HEX, RGB, HSL, CSS, JSON or copy them in one click. Perfect for sharing a color guide with your team or documenting a design system.

    Discover all our Color tools

    Extract, convert, generate palettes, gradients and WCAG contrasts in a few clicks.

    See all tools

    Related tools

    WCAG Analyzer
    Text Readability
    Color Blindness Simulator

    Guides and tutorials

    Learn how to use our tools with our detailed guides.

    color-contrast: practical accessibility guide

    Localized guide to use color-contrast, understand accessibility best practices and avoid common mistakes.

    Why do some colors cause eye fatigue on screen?

    Discover why certain colors cause visual fatigue and how to choose comfortable hues for your digital projects.

    How to verify color contrast for accessibility?

    Complete guide to verifying and optimizing color contrast according to WCAG standards. Tools, methods, and best practices.

    Frequently asked questions

    Yes, the tool is available online for free.

    Processing happens in your browser whenever possible to protect your data.