Toolumen · Accessibility

Contrast Checker

WCAG AA + AAA in two colors

Drop in a foreground and background colour and get the WCAG 2.2 contrast ratio with AA + AAA pass/fail for normal and large text, plus a live preview at four real type sizes. All of the math runs in your browser.

Open in Toolumen All tools

Live This tool now lives in Toolumen, Stacklumen's web-tools product, at toolumen.com/app/contrast.

01 / What it does

WCAG 2.2 AA + AAA for normal and large text
Exact contrast ratio with pass/fail badges
Live preview at four real type sizes
Alpha compositing + brand-safe colour suggestions

02 / More Toolumen tools

Toolumen

Open Contrast Checker in Toolumen.

The live tool runs at toolumen.com — free with a Stacklumen account.

Open in Toolumen

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Apps

Contrast Checker

Open Contrast Checker in Toolumen.