Web Accessibility (WCAG) Compliance Guide

What Is Web Accessibility?

Web accessibility means designing and developing websites that can be used by everyone, including people with disabilities. This includes individuals who are blind or have low vision, deaf or hard of hearing, have motor impairments, cognitive disabilities, or situational limitations like using a phone in bright sunlight.

Approximately 15% of the world's population lives with some form of disability. Making your website accessible isn't just the right thing to do; it's also a legal requirement in many jurisdictions and a smart business decision that expands your potential audience.

Understanding WCAG

The Web Content Accessibility Guidelines (WCAG) are the international standard for web accessibility, developed by the World Wide Web Consortium (W3C). WCAG is organized around four principles, known by the acronym POUR:

1. Perceivable

Information and user interface components must be presentable to users in ways they can perceive. Users must be able to process the information through at least one of their senses.

2. Operable

User interface components and navigation must be operable. Users must be able to interact with all controls and interactive elements.

3. Understandable

Information and the operation of the user interface must be understandable. Users must be able to comprehend the content and how to use the interface.

4. Robust

Content must be robust enough to be interpreted reliably by a wide variety of user agents, including assistive technologies.

WCAG Conformance Levels

Most legal requirements and best practices target WCAG 2.2 Level AA compliance.

Essential Accessibility Requirements

Text Alternatives

Every non-text element needs a text alternative that conveys the same information:

• Images: Add descriptive alt text to all meaningful images. Decorative images should use empty alt attributes (alt="")
• Videos: Provide captions for deaf users and audio descriptions for blind users
• Icons: Include accessible labels for icon-only buttons and links
• Complex graphics: Charts and infographics need detailed text descriptions

Keyboard Navigation

All functionality must be accessible using only a keyboard, as many users cannot use a mouse:

• All interactive elements must be reachable via the Tab key
• Focus order must follow a logical, visual sequence
• Focus indicators must be clearly visible (never use outline: none without providing an alternative)
• No keyboard traps where focus cannot move away from an element
• Custom components must implement appropriate keyboard patterns

Color and Contrast

Color must not be the only means of conveying information, and text must have sufficient contrast:

• Normal text: minimum contrast ratio of 4.5:1 against its background
• Large text (18px+ bold or 24px+ regular): minimum contrast ratio of 3:1
• UI components and graphical objects: minimum contrast ratio of 3:1
• Don't rely on color alone to indicate status, errors, or required fields

Forms and Input

Forms are critical interaction points that must be fully accessible:

• Every form field must have an associated label element
• Group related fields using fieldset and legend elements
• Provide clear error messages that identify what went wrong and how to fix it
• Don't rely solely on placeholder text as labels
• Support autocomplete attributes for common fields (name, email, address)

Semantic HTML

Using the correct HTML elements provides built-in accessibility:

• Use heading tags (H1-H6) in proper hierarchical order
• Use nav, main, aside, footer landmark elements
• Use button for actions and a for navigation
• Use table with proper th and scope attributes for data tables
• Use ordered and unordered lists for list content

ARIA: When HTML Isn't Enough

ARIA (Accessible Rich Internet Applications) attributes enhance accessibility for custom interactive components:

• aria-label: Provides an accessible name when visible text isn't available
• aria-describedby: Links an element to its description
• aria-expanded: Indicates whether a collapsible section is open or closed
• aria-live: Announces dynamic content changes to screen readers
• role: Defines the purpose of non-semantic elements

The first rule of ARIA is: don't use ARIA if a native HTML element can achieve the same result. Native elements have built-in keyboard interaction and screen reader support.

Testing for Accessibility

Automated Testing

Automated tools catch approximately 30-40% of accessibility issues:

• axe DevTools: Browser extension that scans pages for WCAG violations
• Lighthouse: Built into Chrome DevTools with an accessibility audit
• WAVE: Web Accessibility Evaluation Tool that highlights issues visually
• Pa11y: Command-line tool for CI/CD pipeline integration

Manual Testing

Manual testing catches issues automated tools miss:

• Navigate the entire site using only a keyboard
• Test with screen readers (NVDA on Windows, VoiceOver on macOS/iOS)
• Verify content is understandable without images or CSS
• Check that all interactive elements have clear focus indicators
• Test with browser zoom up to 200%

User Testing

Include people with disabilities in your testing process. Their real-world experience reveals usability issues that neither automated nor manual expert testing can fully capture.

Legal Requirements

Accessibility is legally required in many regions:

• ADA (USA): Courts increasingly interpret the Americans with Disabilities Act to cover websites
• EAA (EU): The European Accessibility Act requires digital services to be accessible
• EN 301 549 (EU): Technical standard for public sector websites
• AODA (Canada): Accessibility for Ontarians with Disabilities Act

Lawsuits related to web accessibility have increased significantly in recent years. Proactive compliance is far less expensive than reactive legal defense.

Getting Started with Accessibility

1. Audit your current site: Run automated tests and perform manual keyboard testing
2. Prioritize fixes: Address critical issues first (keyboard access, text alternatives, contrast)
3. Train your team: Developers, designers, and content authors all play a role in accessibility
4. Integrate into your process: Make accessibility part of your design and development workflow, not an afterthought
5. Test continuously: Include accessibility checks in your CI/CD pipeline and QA process

Building accessible websites from the start is significantly easier than retrofitting accessibility later. Ekolsoft incorporates WCAG compliance into its development process, ensuring that websites meet accessibility standards from launch while providing an inclusive experience for all users.