Contrast Ratio Calculator

WCAG (Web Content Accessibility Guidelines) defines minimum contrast ratios between text and background colors. Level AA requires 4.5:1 for normal text and 3:1 for large text. Level AAA requires 7:1 for normal text and 4.5:1 for large text.

Proper contrast ensures text is readable for people with low vision, color blindness, or those viewing screens in bright sunlight. Poor contrast affects approximately 1 in 12 men and 1 in 200 women who have color vision deficiencies.

Yes, completely free with no signup required. Enter foreground and background colors to instantly check WCAG AA and AAA compliance.

Dewx CX Hub includes built-in accessibility tools for website building, ensuring your pages meet WCAG standards with automatic contrast checking and aria label suggestions.