WCAG 2.2 Quick Reference
A condensed guide to the most important WCAG success criteria with practical implementation tips.
Level A Minimum Requirements
These are essential—without them, some users cannot access your content at all.
Non-text Content
All images need alt text. Decorative images use alt=""
Audio-only and Video-only
Provide transcripts for audio and descriptions for video
Info and Relationships
Use semantic HTML: headings, lists, tables with proper markup
Use of Color
Don't rely on color alone to convey information
Keyboard
All functionality must be keyboard accessible
No Keyboard Trap
Users can navigate away from any element with keyboard
Bypass Blocks
Provide skip links to bypass repeated content
Page Titled
Every page needs a unique, descriptive title
Language of Page
Set the lang attribute on the html element
Parsing
Valid HTML with unique IDs and proper nesting
Level AA Standard Compliance Target
Most laws require Level AA. These address common barriers for disabled users.
Contrast (Minimum)
4.5:1 for text, 3:1 for large text (18pt+ or 14pt bold)
Resize Text
Text can be resized 200% without loss of functionality
Images of Text
Use real text, not images of text
Focus Order
Tab order follows logical reading order
Headings and Labels
Headings and labels describe topic or purpose
Focus Visible
Keyboard focus indicator is always visible
Consistent Navigation
Navigation appears in same order across pages
Error Identification
Form errors are described in text
Labels or Instructions
Form inputs have labels and instructions
Error Suggestion
Provide suggestions to fix errors