color-accessibility
Design color palettes that are accessible to all users including those with color blindness. Ensure sufficient contrast, meaningful use of color, and inclusive design.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill color-accessibility- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads color-accessibility automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Color Accessibility
Table of Contents
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
FAQ
What does the color-accessibility skill do?
Design color palettes that are accessible to all users including those with color blindness. Ensure sufficient contrast, meaningful use of color, and inclusive design.
How do I install color-accessibility?
Run npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill color-accessibility in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/color-accessibility/ (personal) or .claude/skills/color-accessibility/ (project).
Which AI agents can use color-accessibility?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is color-accessibility safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains color-accessibility?
It is published by aj-geddes in aj-geddes/useful-ai-prompts. It has 619 recorded installs.
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