Demo Mode · Melbourne CBD
Verify & Secure Map Cues
Work on a real street map: import GeoJSON or draw routes and markers anywhere. Check how critical cues hold up under simulated colour vision differences, improve their visual encodings, and export the results.
Flinders Street to Melbourne Central
01Main route and backup route look the samePeople with green-blind vision (deuteranopia)
Under green-blind vision, main route (#22c55e) and backup route (#ef4444) become hard to tell apart when colour is the only difference.
Suggested Fix: Make Backup route dashed and a different thickness; keep Main route solid.
ΔE difference: 76.2 → 7.8 under deuteranopia. Threshold: 15.
02Hazard may be confused with main routePeople with green-blind vision (deuteranopia)
Under green-blind vision, main route (#22c55e) and hazard (#f97316) become hard to tell apart when colour is the only difference.
Suggested Fix: Give Hazard a triangle icon and a text label on the map — do not rely on orange alone.
ΔE difference: 60.4 → 10.0 under deuteranopia. Threshold: 15.
03Hazard may be confused with main routePeople with red-blind vision (protanopia)
Under red-blind vision, main route (#22c55e) and hazard (#f97316) become hard to tell apart when colour is the only difference.
Suggested Fix: Give Hazard a triangle icon and a text label on the map — do not rely on orange alone.
ΔE difference: 60.4 → 14.1 under protanopia. Threshold: 15.
04Hazard may be confused with backup routePeople with blue-blind vision (tritanopia)
Under blue-blind vision, backup route (#ef4444) and hazard (#f97316) become hard to tell apart when colour is the only difference.
Suggested Fix: Give Hazard a triangle icon and a text label on the map — do not rely on orange alone.
ΔE difference: 19.7 → 7.2 under tritanopia. Threshold: 15.
05Hazard may be confused with backup routePeople with green-blind vision (deuteranopia)
Under green-blind vision, backup route (#ef4444) and hazard (#f97316) become hard to tell apart when colour is the only difference.
Suggested Fix: Give Hazard a triangle icon and a text label on the map — do not rely on orange alone.
ΔE difference: 19.7 → 9.4 under deuteranopia. Threshold: 15.
Testing & CI Report
Exports verification proofs, CIEDE2000 calculations, and cue states.
CueLock verifies navigation cues using Machado, Oliveira & Fernandes (2009) linear-RGB simulation, CIEDE2000 color difference, and a strict dual-encoding rule. It is a research instrument for map designers, not a formal WCAG certification.