Check the contrast ratio between foreground and background colors for common text-accessibility thresholds.
Readable sample text
How to read the result
The ratio ranges from 1:1 to 21:1. The tool reports common WCAG text thresholds, including 4.5:1 for normal text and 3:1 for large text.
Scope
Contrast is one accessibility requirement. Passing a ratio does not by itself make an interface fully accessible.