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Accessibility Calculator

Free accessibility calculator to calculate color contrast ratio. Instant results in your browser — no signup.

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Direct calculator

Enter values and calculate an instant answer.

Inputs

Enter the values, then calculate.

Results update when you click Calculate.

Result

Primary answer and useful breakdowns.

Contrast ratio

1.00

((foreground_and_background_co) + 0.05) / ((foreground_and_background_co) + 0.05)

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Recently used

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What this result means

Free accessibility calculator to calculate color contrast ratio. Instant results in your browser — no signup. Calculate color contrast ratio: ((foreground_and_background_co) + 0.05) / ((foreground_and_background_co) + 0.05).

Assumptions

  • Rule dependency: Standard dependent.

How it works

Calculate color contrast ratio: ((foreground_and_background_co) + 0.05) / ((foreground_and_background_co) + 0.05).

Example

Example: “contrast ratio calculator”. Enter your values and click the button to get a result.

Frequently asked questions

What does this color contrast ratio calculator do?+

It helps you calculate color contrast ratio. Typical search: “contrast ratio calculator”.

How should I read the result?+

Calculate color contrast ratio using foreground and background colors. Result: contrast ratio / WCAG status.