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

Compare realistic color contrast checker scenarios without switching between spreadsheets or separate references.

Change one assumption at a time to see how the result moves.

Use the interactive output as a quick planning baseline before deeper review.

Tips for better results

Validate all required inputs before trusting the result.
Test at least one conservative scenario before acting on the output.
Recalculate when your assumptions, costs, or constraints change.

FAQ

Which WCAG thresholds are shown?

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

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.

Was this tool helpful?

The live site includes quick helpful or unhelpful responses so SmartToolsHub can prioritize fixes and feature requests for Color Contrast Checker.

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