WCAG color contrast checker

WCAG color contrast checker — free color tool on Lagnis, private in-browser.

WCAG color contrast checker is a contrast utility with inputs tailored to this page—not a generic shell. Everything runs in your browser; nothing is uploaded to our servers.

How to use

Open WCAG color contrast checker and read the on-page labels (the labeled fields on the form).
Provide your values and run the tool.
Copy or download the output as offered on this page.

FAQ

What makes WCAG color contrast checker different from similar tools?

Each page covers one intent; browse categories if you need a different formula or converter.

Where is my data processed for WCAG color contrast checker?

Inside your browser session; nothing is stored on Lagnis servers.

Embed this calculator

Paste the snippet on your site or blog — the widget stays responsive inside the iframe.

<iframe src="https://lagnis.com/tools/color-contrast-checker/embed/" title="WCAG color contrast checker" loading="lazy" style="width:100%;max-width:640px;min-height:420px;border:0;border-radius:12px" referrerpolicy="strict-origin-when-cross-origin"></iframe>

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