Color.review is a free WCAG contrast checker that tests a foreground and background color pair against both AA and AAA accessibility levels.
It explains why the same numeric contrast ratio reads differently depending on hue, noting that blue text on white reads more easily than yellow at an equivalent contrast score, which most basic checkers don't surface.
Designers who want a quick pass or fail on a specific color pair, plus a bit of context on why a technically-passing combination might still feel harder to read.
Check both AA and AAA results, not merely AA. Government and enterprise clients increasingly require AAA for body text, and it's easy to assume AA compliance is automatically enough.
A modern tool for exploring and finding accessible colour combinations.
