Why Contrast Ratios Exist
How the eye and the math behind 4.5 to 1 connect.
What Contrast Really Means
When you read text, your eye is comparing how light or dark the letters are against the background. That gap is contrast. 👀
Why We Need a Number
One designer says a color looks fine, another squints. To settle it, accessibility uses a contrast ratio, a single measurable number anyone can check.
All lessons in this course
- Why Contrast Ratios Exist
- Hitting AA: Text and Large Text Thresholds
- Never Rely on Color Alone
- Checking Contrast With Free Tools