How to use this tool
Choose text and background colors. The result shows the contrast ratio and WCAG AA/AAA thresholds for normal and large text.
Good to know
Evaluates opaque sRGB colors only. Large text means at least 18 point regular or 14 point bold. Passing this check does not establish full WCAG compliance; images, transparency and actual rendering may affect contrast. Colors are processed locally and are not saved.