- Color contrast
- Juicy Studio Colour Contrast Analyzer
- Firefox extension
- Rainbow (color picker)
- Make sure regular text and linked text can be distinguished from background color
- Red/green color blindness most common
- Juicy Studio Colour Contrast Analyzer
- Alt attributes on images
- W3C HTML Validator
- Web Accessibility Evaluation Tool (WAVE) - site evaluator or Firefox extension
- Use text in alt attributes for images that are part of content
- If image is decorative, take it out of HTML and put in via CSS background-image
- If image is not part of content but can't be placed in CSS, include alt attribute but leave it empty (alt="")