Accessibility
Readable, operable messages for people of all abilities.
3 topics in this category.
About this category
This section collects production-verified specifications, implementation standards, and operational guidelines for accessibility. Each specification provides clear compliance levels (Required, Recommended, Optional, or Avoid) alongside concrete testing methods and platform considerations.
Topics
Semantic HTML Structure & Screen Reader Accessibility
RecommendedStructure email markup with true semantic HTML elements (h1-h3, p, ul, ol), document language declarations, and clear hierarchical reading order.
Color Contrast & Dark Mode Adaptation in Email
RecommendedMeet WCAG 2.2 AA contrast standards (minimum 4.5:1) while architecting email designs for dark mode color inversions across Outlook, Apple Mail, and Gmail.
Accessible Image Alt Text & Image-Off Fallbacks
RequiredProvide meaningful alternative text for informative images, null alt attributes for decorative graphics, and styled fallbacks when remote images are blocked.