Contrast Checker

This is especially useful for reviewing design tokens, components, links, and interactive states. Nothing about the narrow interface removes the need for judgment, but it does make the small operation easier to repeat and explain during a review.

A reliable workflow is to use representative input rather than a perfect demonstration sample, review the output beside the original, and repeat the operation with empty values, unusual characters, larger content, and one intentionally broken case, because a tool is most useful when it helps reveal assumptions before those assumptions reach production.

Contrast Checker is built to measure text and background colors against WCAG contrast thresholds. It stays focused.

Contrast is only one part of accessibility, and passing the numeric threshold does not replace checks for focus, semantics, motion, or color-independent meaning. Keep a reversible copy until the final result has been accepted by its destination.

Start with foreground and background colors plus the intended text size. The page returns a contrast ratio with AA and AAA outcomes, and you can inspect that result before it becomes part of another file, request, document, or application setting.