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Why Is Web Accessibility Important?

Approximately 15% of the world's population lives with some form of disability. Web accessibility (a11y) is a design approach that ensures digital content is usable by everyone, including people with disabilities. At BUZ Yazılım, we have prioritized accessibility standards compliance in our projects since 2007.

What Are WCAG Standards?

Web Content Accessibility Guidelines (WCAG) are international web accessibility standards established by W3C. WCAG 2.1 is built on four core principles:

1. Perceivable

Content must be perceivable by at least one of the user's senses.

• Text alternatives: Provide meaningful alt text for images
• Captions: Add captions and transcripts for video content
• Color contrast: Sufficient contrast ratio between text and background (at least 4.5:1)
• Resizable text: Users should be able to enlarge text up to 200%

2. Operable

Interface components and navigation must be usable.

• Keyboard access: All functions must be accessible via keyboard
• Sufficient time: Give users enough time to read and use content
• Seizure prevention: Avoid content that flashes more than 3 times per second
• Navigation: Provide clear and consistent navigation structure

3. Understandable

Content and interface must be understandable.

• Readable text: Correctly specify the page language
• Predictable behavior: Consistent navigation and component behavior
• Error handling: Show clear and constructive messages when form errors occur
• Labeling: Clearly label form fields

4. Robust

Content must be compatible with various user tools, including assistive technologies.

• Valid HTML: Use semantic and standards-compliant HTML
• ARIA support: Ensure assistive technologies can correctly interpret content
• Compatibility: Test compatibility with different browsers and devices

ARIA Labels and Usage

Accessible Rich Internet Applications (ARIA) adds accessibility information where HTML falls short.

Basic ARIA Roles

• role="navigation": Navigation section
• role="main": Main content area
• role="banner": Site header
• role="alert": Dynamic alert messages

ARIA Properties

• aria-label: Non-visual description
• aria-describedby: Detailed description reference
• aria-hidden="true": Hidden from screen readers
• aria-expanded: Indicates expanded/collapsed state
• aria-live: Announces dynamic content updates

Important rule: Don't use ARIA if native HTML elements are sufficient. Prefer semantic HTML first.

Accessibility Testing Tools

Tools you can use to test your site's accessibility:

• Lighthouse: Free accessibility audit within Chrome DevTools
• axe DevTools: Detailed accessibility scanning extension
• WAVE: Web accessibility evaluation tool
• NVDA / VoiceOver: Real user experience testing with screen readers
• Color Contrast Analyzer: Color contrast checking tool

Practical Tips

To quickly improve your website's accessibility:

• Add meaningful alt text to all images
• Use heading hierarchy (h1-h6) correctly
• Always add labels to form fields
• Write descriptive link text ("view our services" instead of "click here")
• Don't remove focus indicator styles
• Add a skip navigation link

Conclusion

Web accessibility is not just a legal requirement but also a way to reach a broader audience and provide a better user experience. At BUZ Yazılım, we ensure WCAG compliance in our projects and offer accessibility consulting to our clients.

Contact us for an accessibility audit of your website.