Make Text Readable: Contrast Ratios Explained Simply

Published May 28, 2026 · By the ChromaPick team

If users cannot read the text, the palette failed — no matter how stylish it looks in a mockup. Contrast is the difference in perceived lightness between text and background. Accessibility guidelines turn that idea into measurable ratios so teams can stop guessing.

WCAG in plain language

• AA for normal text: aim for at least 4.5:1.
• AA for large text: 3:1 can be acceptable when type is big and bold.
• AAA: stricter targets for organizations that need maximum readability.

You do not need to memorize formulas. You need a habit: check every important text style against its real background, including hover states and images with overlays.

Common contrast failures

1. Light gray body text on white “for a clean look.”
2. White text on a medium brand color that only looked dark on one monitor.
3. Placeholder text that is so faint people miss required fields.
4. Buttons that rely on color alone with low-contrast labels.

Fast fixes

Darken text before you abandon a brand color. Add a translucent scrim behind text on photos. Increase weight or size when you are close to the threshold. Keep disabled styles visibly quieter than active ones, but not invisible.