How do I test for WCAG 1.3.3 compliance?

To test Sensory Characteristics: use automated tools like AltorLab's scanner for initial detection, then manually verify with keyboard navigation and screen reader testing. Check the specific failure modes described in the WCAG documentation.

🟢 Level A

WCAG 1.3.3: Sensory Characteristics

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Success Criterion 1.3.3 — Level A

Quick Answer

Instructions must not rely only on shape, color, size, location, or sound.

Why It Matters

'Click the red button' or 'see the form on the left' excludes blind users and those with color blindness.

How to Audit

Run an automated accessibility scan to detect common Sensory Characteristics failures. Then manually verify with: keyboard-only navigation, a screen reader (VoiceOver on Mac, NVDA on Windows), and browser developer tools. Automated tools catch approximately 40% of Sensory Characteristics issues — manual testing is essential.

How to Fix

Use text labels for all interactive elements. Don't say 'click the green button' — say 'click Submit'.

Frequently Asked Questions

What is WCAG 1.3.3 Sensory Characteristics?

Instructions must not rely only on shape, color, size, location, or sound.

Is WCAG 1.3.3 required for ADA compliance?

WCAG 2.1 Level A is the minimum baseline for ADA website compliance. Courts have upheld WCAG 2.1 AA as the standard for ADA Title III lawsuits.

How do I fix WCAG 1.3.3 violations?

Use text labels for all interactive elements. Don't say 'click the green button' — say 'click Submit'.

Disclaimer: This guide is for informational purposes only and does not constitute legal advice. Consult a qualified ADA/accessibility attorney for your specific compliance situation.

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