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Accessibility Calculator

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

Also known as: Calculate color contrast ratio, contrast ratio calculator, calculate color contrast ratio calculator, calculate color contrast ratio, accessibility computing & technology, accessibility calculate color contrast ratio

Direct calculator

Inputs

Results update when you click Calculate.

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.