Claude Code for WCAG 2.2 Compliance (2026)

Last updated: April 17, 2026

Claude Code for WCAG 2.2 Compliance Workflow Guide

Web accessibility is no longer optional, it’s a legal requirement in many jurisdictions and a fundamental aspect of inclusive design. WCAG 2.2 (Web Content Accessibility Guidelines) introduces several new success criteria that address user experience gaps for people with disabilities. This guide shows you how to use Claude Code to build, audit, and maintain WCAG 2.2 compliant applications throughout your development workflow.

Understanding WCAG 2.2 Key Changes

WCAG 2.2 builds on previous versions with three new success criteria that directly impact code implementation:

1.4.3 Contrast (Minimum) AA, Requires text contrast ratio of at least 4.5:1 for normal text
1.4.11 Non-text Contrast AA, Requires 3:1 contrast for UI components and graphics
2.4.7 Focus Visible AAA, Requires visible focus indicators on all interactive elements
2.5.7 Dragging Movements AA, No reliance on dragging unless dragging is essential
3.2.9 Focus Not Inseparable AA, Focus movement must be perceivable and not hidden

Claude Code can help you implement these criteria systematically, catching accessibility issues before they reach production.

Setting Up Your Accessibility-First Workflow

Before writing code, configure Claude Code with accessibility-aware prompts. Create a skill that defines your accessibility requirements:

---
name: accessibility-audit
description: Audit code for WCAG 2.2 compliance
---
When reviewing code for accessibility, check for:
1. Semantic HTML structure (proper heading hierarchy, landmark regions)
2. ARIA attributes used correctly (not as a for missing semantics)
3. Keyboard navigation support (focusable elements, tab order)
4. Color contrast compliance (4.5:1 for text, 3:1 for UI)
5. Form labels and error handling
6. Focus management for modals and dynamic content

This skill becomes your accessibility reviewer, automatically checking every component you create.

Implementing Accessible Components with Claude Code

Focus Management for Modals

One of the most common accessibility failures involves modal dialogs. Claude Code can generate properly accessible modal components:

// Accessible Modal Component
function Modal({ isOpen, onClose, title, children }) {
 const modalRef = useRef(null);
 const previousFocusRef = useRef(null);
 useEffect(() => {
 if (isOpen) {
 previousFocusRef.current = document.activeElement;
 modalRef.current?.focus();
 document.body.style.overflow = 'hidden';
 } else {
 previousFocusRef.current?.focus();
 document.body.style.overflow = '';
 }
 }, [isOpen]);
 // Trap focus within modal
 useEffect(() => {
 const handleKeyDown = (e) => {
 if (e.key === 'Escape') {
 onClose();
 return;
 }
 if (e.key === 'Tab') {
 const focusable = modalRef.current.querySelectorAll(
 'button, [href], input, select, textarea, [tabindex]:not([tabindex="-1"])'
 );
 const first = focusable[0];
 const last = focusable[focusable.length - 1];
 
 if (e.shiftKey && document.activeElement === first) {
 e.preventDefault();
 last.focus();
 } else if (!e.shiftKey && document.activeElement === last) {
 e.preventDefault();
 first.focus();
 }
 }
 };
 if (isOpen) {
 document.addEventListener('keydown', handleKeyDown);
 }
 return () => document.removeEventListener('keydown', handleKeyDown);
 }, [isOpen, onClose]);
 if (!isOpen) return null;
 return (
 <div 
 role="dialog" 
 aria-modal="true" 
 aria-labelledby="modal-title"
 ref={modalRef}
 tabIndex="-1"
 >
 <h2 id="modal-title">{title}</h2>
 <button onClick={onClose} aria-label="Close modal">
 <span aria-hidden="true">×</span>
 </button>
 {children}
 </div>
 );
}

Ask Claude Code to explain each accessibility feature in this component, it will walk you through the focus trap, aria attributes, and keyboard handling.

Auditing Existing Code for Violations

Beyond building new accessible components, Claude Code works as a direct code-analysis partner for existing code. Share your markup and ask Claude to identify WCAG violations:

// Ask Claude Code to review this HTML for accessibility issues
const pageContent = `
 <div class="header">
 <div class="logo">Company</div>
 <div class="nav">
 <a href="/about">About</a>
 <a href="/contact">Contact</a>
 </div>
 </div>
 <button>Click here</button>
`;

Claude identifies missing landmark regions (<header>, <nav>, <main>), the lack of proper heading hierarchy, and the need for descriptive button text instead of “Click here.” This hands-on checker workflow. paste code, get feedback, iterate. catches issues that automated tools miss because it understands intent, not just syntax.

Automated Testing for Accessibility

Integrate accessibility testing into your CI/CD pipeline using established tools. Claude Code can help write these tests:

// accessibility.test.js
import { axe, toHaveNoViolations } from 'jest-axe';
expect.extend(toHaveNoViolations);
describe('Accessibility Tests', () => {
 test('Homepage should have no accessibility violations', async () => {
 const { container } = render(<App />);
 const results = await axe(container);
 expect(results).toHaveNoViolations();
 });
 test('Modal should be keyboard accessible', async () => {
 render(<Modal isOpen={true} title="Test Modal" />);
 
 // Verify modal traps focus
 const modal = screen.getByRole('dialog');
 const closeButton = screen.getByLabelText('Close modal');
 
 expect(closeButton).toHaveFocus();
 
 // Test Tab cycles within modal
 await userEvent.keyboard('{Tab}');
 // Focus should cycle back to close button
 expect(closeButton).toHaveFocus();
 });
 test('Form inputs must have associated labels', async () => {
 render(<LoginForm />);
 const inputs = screen.getAllByRole('textbox');
 
 inputs.forEach(input => {
 const label = screen.getByLabelText(input.getAttribute('aria-label') || '');
 expect(label).toBeInTheDocument();
 });
 });
});

Run these tests locally with Claude Code monitoring the output for specific accessibility failures.

Color Contrast Checking Workflow

Claude Code can analyze your color palette for WCAG compliance. Create a simple contrast checker:

// contrast-checker.js
function getContrastRatio(color1, color2) {
 const lum1 = getLuminance(color1);
 const lum2 = getLuminance(color2);
 const lighter = Math.max(lum1, lum2);
 const darker = Math.min(lum1, lum2);
 return (lighter + 0.05) / (darker + 0.05);
}
function getLuminance(hex) {
 const rgb = hexToRgb(hex);
 const [r, g, b] = rgb.map(c => {
 c = c / 255;
 return c <= 0.03928 ? c / 12.92 : Math.pow((c + 0.055) / 1.055, 2.4);
 });
 return 0.2126 * r + 0.7152 * g + 0.0722 * b;
}
// WCAG 2.2 thresholds
const requirements = {
 AA_normal: 4.5,
 AA_large: 3.0,
 AAA_normal: 7.0,
 AAA_large: 4.5,
 UI_components: 3.0
};
function checkCompliance(ratio) {
 return {
 AA_normal: ratio >= requirements.AA_normal,
 AA_large: ratio >= requirements.AA_large,
 AAA_normal: ratio >= requirements.AAA_normal,
 AAA_large: ratio >= requirements.AAA_large,
 UI_components: ratio >= requirements.UI_components
 };
}

Ask Claude Code to generate a comprehensive color audit of your design system, it will check each color combination against these thresholds.

Real-Time Accessibility Review Process

Establish a workflow where Claude Code reviews accessibility before any merge:

Pre-commit hook: Run axe-core on staged files
Pull request review: Claude Code analyzes changed components
CI pipeline: Full accessibility audit with lighthouse
Post-deployment: Automated monitoring for regressions

.github/workflows/accessibility.yml
name: Accessibility Audit
on: [pull_request]
jobs:
 accessibility:
 runs-on: ubuntu-latest
 steps:
 - uses: actions/checkout@v3
 - uses: actions/setup-node@v3
 - run: npm install
 - run: npm run test:a11y
 - name: Runaxe audit
 run: npx axe https://staging.example.com --exit

Actionable Tips for WCAG 2.2 Compliance

Start with semantic HTML: Use <button>, <a>, <nav>, <main> instead of <div> for interactive elements
Test with keyboard only: Navigate your entire application using only Tab, Shift+Tab, Enter, and Escape
Use CSS custom properties for theming: Make contrast adjustments easy across light/dark modes
Document ARIA usage: Explain why each ARIA attribute exists in code comments
Automate early: Integrate accessibility testing from day one rather than retrofitting later

Limitations and Complementary Testing

While Claude Code is powerful for code-level analysis, automated tools cannot detect all accessibility issues. Things like whether alt text meaningfully describes an image, whether error messages are helpful, or whether the overall user experience is usable for people with disabilities require human judgment. The most effective accessibility strategy combines automated testing with axe-core, AI-assisted code review with Claude Code, manual testing with screen readers (NVDA, VoiceOver, JAWS), and user testing with people who have disabilities.

Conclusion

Building WCAG 2.2 compliant applications doesn’t have to be a manual, time-consuming process. By integrating Claude Code into your workflow, with accessibility-focused skills, automated testing, and systematic component patterns, you create a sustainable system that catches issues early and maintains compliance over time.

Start by adding an accessibility skill to your Claude Code configuration, then progressively add automated tests for each component you build. The initial investment pays dividends in reduced remediation costs, broader user reach, and legal compliance.

This guide is part of the Claude Skills Guide series, providing practical workflows for modern web development.

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