Color Contrast Checker

WCAG contrast ratio measures the difference in luminance between foreground and background colors. It ranges from 1:1 (no contrast) to 21:1 (maximum contrast). Higher ratios mean better readability.

WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. WCAG AAA requires 7:1 for normal text and 4.5:1 for large text.

Large text is defined as 18pt (24px) or larger, or 14pt (18.66px) bold or larger. Large text has lower contrast requirements because it is easier to read at lower contrast.

Proper color contrast ensures text is readable for people with visual impairments, including color blindness and low vision. It also improves readability for everyone in various lighting conditions.