Color accessibility

Skill ulpi-io/plugin-marketplace/plugins/aj-geddes/skills/color-accessibility

A curated collection of 7,800+ agent skills for Claude Desktop, sourced from skills.sh

Install

npx -y skills add ulpi-io/plugin-marketplace --skill color-accessibility

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What its author says it does

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Design color palettes that are accessible to all users including those with color blindness. Ensure sufficient contrast, meaningful use of color, and inclusive design.

SKILL.md

2.5 KB, as published. Nobody here has run it

Overview

Accessible color design ensures all users, including those with color vision deficiency, can access and understand information.

When to Use

Creating color palettes
Designing data visualizations
Testing interface designs
Status indicators and alerts
Form validation states
Charts and graphs

Quick Start

Minimal working example:

WCAG Contrast Ratios:

WCAG AA (Minimum):
  - Normal text: 4.5:1
  - Large text (18pt+): 3:1
  - UI components & graphical elements: 3:1
  - Focus indicators: 3:1

WCAG AAA (Enhanced):
  - Normal text: 7:1
  - Large text: 4.5:1
  - Better for accessibility

---
Testing Contrast:

Tools:
  - WebAIM Contrast Checker
  - Color Contrast Analyzer
  - Figma plugins
  - Browser DevTools

Formula (WCAG): Contrast = (L1 + 0.05) / (L2 + 0.05)
  Where L = relative luminance

// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
Color Contrast Standards	Color Contrast Standards
Color Vision Deficiency Simulation	Color Vision Deficiency Simulation
Accessible Color Usage	Accessible Color Usage
Testing & Validation	Testing & Validation

Best Practices

✅ DO

Ensure 4.5:1 contrast minimum (WCAG AA)
Test with color blindness simulator
Use patterns or icons with color
Label states with text, not color alone
Test with real users with color blindness
Document color usage in design system
Choose accessible color palettes
Use sequential colors for ordered data
Validate all color combinations
Include focus indicators

❌ DON'T

Use color alone to convey information
Create low-contrast text
Assume users see colors correctly
Use red-green combinations
Forget about focus states
Mix too many colors (>5-8)
Use pure red and pure green together
Skip contrast testing
Assume AA is sufficient (AAA better)
Ignore color blindness in testing