All WCAG criteria
WCAG 2.1·Perceivable·1.4 Distinguishable

1.4.3 Contrast (Minimum)

Level AA

Body text must have a contrast ratio of at least 4.5:1 against its background; large text needs 3:1.

Why it matters

Low contrast is the most common WCAG failure. It hits low-vision users, older adults, and anyone in bright sunlight.

Common failure
<p style="color:#999;background:#fff">Hello</p> /* 2.85:1 */
Accessible version
<p style="color:#595959;background:#fff">Hello</p> /* 7:1 */

How OnlyEnable handles this

Automatically remediated. OnlyEnable's "High Contrast" and "Dark" profiles override site colors to safe combinations.

Related criteria in 1.4 Distinguishable