Low-contrast text is one of the most common WCAG AA failures — and one of the easiest to fix once you know the numbers.
Normal text needs a contrast ratio of at least 4.5:1 against its background. Large text (18pt, or 14pt bold) needs at least 3:1. User-interface components and meaningful graphics also need at least 3:1.
Use a contrast checker with the foreground and background hex values. Watch out for text over images or gradients — the contrast must hold across the whole area the text sits on.
Darken light-gray body text, avoid pale text on white, and don’t place white text on light brand colors. Sale badges and call-to-action buttons are frequent offenders.
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