1. The Legal and Ethical Imperative of Accessibility
Web accessibility ensures people with visual, motor, auditory, or cognitive disabilities can access digital information without barriers. Beyond ethical responsibility, compliance with WCAG 2.2 is legally mandated across many jurisdictions and directly influences Google search quality scores.
2. Typographic Readability Guidelines
- Optimal Reading Measure: Limit line lengths to 50–75 characters per line (approx.
max-width: 65ch) to prevent eye strain during long-form reading. - Generous Line Height: Maintain a minimum line height of 1.5 to 1.7 on body text to ensure comfortable vertical rhythm.
- Font Resizing Without Layout Breakage: Test layouts at 200% browser zoom to verify text does not clip or overflow container boundaries.
3. Focus Indicators for Keyboard Navigation
Never write outline: none without providing an accessible alternative. Power users and individuals with motor disabilities navigate web applications via Tab and Shift+Tab key sequences. Customized, high-contrast focus rings (e.g. focus-visible:ring-2 focus-visible:ring-indigo-500) are mandatory.
4. Color Blindness Considerations
Approximately 8% of men and 0.5% of women have red-green color blindness. Never convey critical system states using color alone—always pair color badges with descriptive icons and clear text labels.
