Free Free Tool
Contrast Ratio Checker (WCAG)
Check foreground/background color contrast against WCAG AA and AAA accessibility guidelines.
- Free · no sign-up
- Instant results
- Privacy-friendly
Other Color Tools
About this tool
Check foreground/background color contrast against WCAG AA and AAA accessibility guidelines.
The WCAG 2.1 contrast formula uses relative luminance: pairs at 4.5:1 satisfy AA for body text, and 7:1 satisfies AAA. Large text (18pt+ or 14pt+ bold) only needs 3:1 / 4.5:1 respectively.