Principle 1 Perceivable · Guideline 1.4: Distinguishable
1.4.11 Non-text Contrast
Controls and meaningful graphics need 3:1 contrast too.
What this means in practice
Covers input borders, buttons, toggles, focus indicators and icons that carry meaning. Very light borders around form fields are the classic failure – pretty, but invisible to many.
Normative wording
The binding text lives at the W3C. What you read here is our own faithful rendering – not a quotation.