Failure class
Colour-only signal
State (error, disabled, selected) is shown only by colour.
Who it hits
Colour-vision-deficiency personas and vision agents misread state.
How to fix it
- Add text or icons to every state.
- Check contrast of disabled vs enabled states.
- Never rely on red/green alone.
How alt.qa detects it
We tag a finding as “Colour-only signal” when the trace shows this pattern at the blocking step. It only becomes a ticket once it is Confirmed (reproduced in two or more cells or by replay), and we show which personas and agents it hit.
In an Alt Matrix
Look for the pattern: a failing column usually means an agent-class problem; a failing row a persona problem; the same step failing in three or more cells a product bug.
See where agents fail on your funnel.
Run one free cell on a property you own. No sales call, no card.