Can I preview text with my selected colors?

Yes. The built-in preview shows your foreground and background pairing in a readable sample block.

Does it work with hex values?

Yes. The current workflow expects standard six-character hex color values.

Technology

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Color Contrast Checker

Measure WCAG contrast ratios for foreground and background colors and preview readability before shipping a design.

Last updated: March 18, 2026

color contrast checkerwcag contrastaccessibility color checkercontrast ratio

Interactive tool

The live form, validation, and result state for Color Contrast Checker load after the page scripts run. The content below summarizes how the tool works and links to related pages in the catalog.

Check foreground and background color contrast ratios against WCAG thresholds for normal and large text with live preview.

color contrast checkerwcag contrastaccessibility color checkercontrast ratiotext color accessibility

How to use Color Contrast Checker

1
Enter your inputs into the Color Contrast Checker form.
2
Adjust optional settings so the scenario matches your real-world case.
3
Review the result, then tweak one variable at a time to compare outcomes.
4
Keep your best scenario as a baseline for future decisions.

Technical utilities provide rapid validation checks and should be paired with environment-specific testing.

Best use cases

Quickly evaluate color contrast checker decisions without switching tools.

Validate technical values and ranges before deployment changes.

Run fast network or data utility checks without external services.

Compare alternate configuration choices during troubleshooting.

How it works

Check foreground and background color contrast ratios against WCAG thresholds for normal and large text with live preview.

color contrast checkerwcag contrastaccessibility color checkercontrast ratiotext color accessibility

FAQ

The tool reports pass or fail levels for normal-text AA and AAA plus large-text AA and AAA.

Tips for better results

Double-check formats, units, and boundary values.
Test a known example first to confirm expected behavior.
Use outputs as a quick check before production changes.

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