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Color Contrast Checker

Compare text and background colors to see the contrast ratio and WCAG compliance.

Color Contrast Checker

Result

Sample Text
Contrast Ratio
—
WCAG AA Normal Text
—
WCAG AAA Normal Text
—
Simple controlsEverything you need for the task.
Clear resultsReview your output before using it.
No signupGet started without an account.

How it works

1. Add the Required Input

The code, structured data, expression, token, or sample value requested by the interface.

2. Review Color Contrast Checker Options

Choose only the settings that apply to the result you need; leave optional controls unchanged when you are unsure.

3. Run a Fresh Check

Start the task and wait for the interface to return its result or a clear setup message.

4. Verify Before You Use It

Test the result in a non-production environment. Never paste passwords, private keys, live access tokens or confidential production data.

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Frequently Asked Questions

The code, structured data, expression, token, or sample value requested by the interface. Start with a representative input and use only the options needed for your intended result.

A transformed, generated, or diagnostic result for the submitted technical input. Treat the output as a current diagnostic snapshot rather than a permanent guarantee.

Test the result in a non-production environment. Never paste passwords, private keys, live access tokens or confidential production data.

Processing stays in the browser where the individual feature supports it. Live public checks use a protected, rate-limited site endpoint; avoid unnecessary sensitive data.

The page can be used without creating a visitor account. Your browser or device may limit unusually large files or demanding media jobs.

About Color Contrast Checker

This Color Contrast Checker page is organised around the task described in the tool interface. Check WCAG contrast ratio between two colors. The result changes when the source data or selected options change, so it is easy to run a second comparison.

Input

What to prepare

The code, structured data, expression, token, or sample value requested by the interface.

Output

What the result represents

A transformed, generated, or diagnostic result for the submitted technical input.

Typical use

A practical example

For a typical workflow, use it to inspect a small representative sample before applying the same change in a production workflow. Start with a representative input, inspect the first result, then adjust one setting at a time if you need a different outcome.

  • Checking data during development with Color Contrast Checker.
  • Preparing a value for testing with Color Contrast Checker.
  • Spotting formatting or validation problems before release with Color Contrast Checker.
Verification

Before you use the result

  • Test the result in a non-production environment. Never paste passwords, private keys, live access tokens or confidential production data.
  • Treat the output as a current diagnostic snapshot rather than a permanent guarantee.
Privacy and processing

Processing stays in the browser where the individual feature supports it. Live public checks use a protected, rate-limited site endpoint; avoid unnecessary sensitive data.