color-contrast
Elements must meet minimum color contrast ratio thresholds
Why it matters
Low-contrast text is unreadable for users with low vision, color blindness, or anyone using a phone in bright sunlight. WCAG AA requires at least 4.5:1 for normal text and 3:1 for large text.
How to fix it
Darken the text or lighten the background (or vice versa) until the contrast ratio passes. Check both normal and hover/focus states, since a fix applied to one can leave the other still failing.