Glossary / UI Design & Visual Design
The measured difference in luminance between foreground text and its background. WCAG 2.1 requires minimum ratios such as 4.5:1 for normal text and 3:1 for large text.
Definition
The measured difference in luminance between foreground text and its background. WCAG 2.1 requires minimum ratios such as 4.5:1 for normal text and 3:1 for large text.
Poor contrast makes content unreadable for many users and is one of the most common accessibility failures.
More terms
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