Principle 1 Perceivable · Guideline 1.3: Adaptable
1.3.3 Sensory Characteristics
Instructions must not rely on shape, colour, size or position alone.
What this means in practice
“Click the round button on the right” is useless to someone who cannot see the page. Name the button instead. Position and colour may be mentioned in addition, never as the only cue.
Normative wording
The binding text lives at the W3C. What you read here is our own faithful rendering – not a quotation.