Canonical ID: color-blind-deuteranopia · Category: Accessibility Personas · Since: v12.0.0

See: Persona-ColorBlind for the full documentation page.

This page documents the color-blind-deuteranopia persona ID as used in the CLI and MCP tools. The full persona documentation is maintained at Persona-ColorBlind.

Quick Reference

Description: User with red-green color blindness (deuteranopia). Affects approximately 8% of males and 0.5% of females. Cannot distinguish red-green color-coded UI cues (error/success states, traffic light patterns).

Cognitive Profile

Trait	Value	Meaning
patience	0.60	Moderate; accustomed to extra verification steps
riskTolerance	0.50	Medium; cautious with color-only indicators
comprehension	0.70	Normal cognitive function
persistence	0.70	High; adapted to working around color limitations
curiosity	0.50	Medium
workingMemory	0.70	Normal capacity
readingTendency	0.70	High; relies on text labels rather than color cues
resilience	0.70	High; well-adapted strategies for daily workarounds
selfEfficacy	0.70	High; adapted strategies work reliably
siteFamiliarity	0.60	Medium-high; functional, experienced user

Key Behaviors

Cannot distinguish red from green (both appear as brownish-yellow)
Relies heavily on text labels, icons, and position for status information
Needs patterns or shapes in addition to color for data visualization
Hesitates on interfaces that use color as the only differentiator
May misinterpret error/success states coded only with red/green

When to Use

Use this persona when testing:

Error and success state visibility (red/green dependence)
Data visualizations and charts using color coding
Status indicators (online/offline, available/busy)
Form validation feedback (red borders, green checkmarks)
Navigation elements using color to indicate state

Usage

npx cbrowser cognitive-journey --persona color-blind-deuteranopia --start https://example.com --goal "check order status"

await cognitive_journey_init({
  persona: "color-blind-deuteranopia",
  goal: "check order status",
  startUrl: "https://example.com"
});

Research Basis

Deuteranopia affects approximately 8% of males and 0.5% of females globally, making it the most common form of color vision deficiency.

Birch, J. (2012). Worldwide prevalence of red-green color deficiency. Journal of the Optical Society of America A, 29(3), 313-320.
W3C WCAG 2.2 (2023). Use of Color: Guideline 1.4.1 - Color must not be the only visual means of conveying information.

Persona-ColorBlind - Full documentation
Persona-Index - All personas
empathy_audit - Run empathy audit with this persona
cognitive_journey_init - Start a cognitive journey

Copyright: (c) 2026 Alexa Eden.

License: MIT License

Contact: [email protected]

Persona ColorBlindDeuteranopia