WCAG Reference
Published
0
min read
Criterion | Level | What it asks |
|---|---|---|
AA | Text needs a contrast ratio of at least 4.5:1 against its background. Large text - 24px or 18.5px bold and above - can drop to 3:1. | |
AAA | Text needs a contrast ratio of at least 7:1 against its background. Large text - 24px or 18.5px bold and above - can drop to 4.5:1. | |
AA | Non-text UI components and graphical objects need a contrast ratio of at least 3:1 against adjacent colours. | |
Guidance | There's no WCAG success criterion that says "text must be at least X pixels." But text size directly affects readability and contrast perception, and WCAG references size thresholds in several places. |