1.3.3 Sensory Characteristics (Level A) — WCAG 2.1
WCAG 2.1 Success Criterion 1.3.3 Sensory Characteristics (Level A): what it requires, a common e-commerce accessibility failure, and how to fix it.
This is educational technical reference content, not legal advice. It explains what WCAG 2.1 requires and how to meet it — not whether a specific site carries legal risk. Compliance with WCAG, the ADA, or any other accessibility law or standard is a legal determination; consult qualified counsel for legal risk assessment.
WCAG 2.1 guidelines hub → Perceivable → 1.3.3 Sensory Characteristics
1.3.3 Sensory Characteristics (Level A)
What it requires: Instructions can’t rely solely on shape, color, size, position, or sound to identify something — “click the green button” or “see the box on the right” fails if the user can’t perceive green or right.
Common failure: Checkout instructions say “select an option from the circles above” to refer to color swatches, with no text label distinguishing which circle is which color/option.
Fix it: Pair every sensory reference with a text alternative: “select a color below (Navy, Forest, Charcoal)” instead of “select a circle above,” with the color name also exposed as the accessible name of each swatch control.
In 1.3 Adaptable: ← 1.3.2 Meaningful Sequence · 1.3.4 Orientation →
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This is educational technical reference content, not legal advice. It explains what WCAG 2.1 requires and how to meet it — not whether a specific site carries legal risk. Compliance with WCAG, the ADA, or any other accessibility law or standard is a legal determination; consult qualified counsel for legal risk assessment.
This page was drafted with AI assistance and reviewed by a person for accuracy before publication.