WCAG in Plain English

Text has a contrast ratio of 4.5 to 1. Large text can be a 3 to 1 ratio if it’s over 24px, or bold and over 19px.

Text can be resized up to 200% without loss of content or functionality, except for captions and images of text.

Text is actual text; not images of text.

Text has a contrast ratio of 7:1 to 1. Large text can be a 4.5 to 1 ratio if it’s over 24px, or bold and over 19px.

For blocks of text, justification must be avoided, line-height must be at least 1.5, width must not exceed 80 characters, and users must be able to set text and background colors.

Text is actual text; never images of text.

Content must remain readable and usable without requiring horizontal scrolling when viewed at a width of 320 CSS pixels (typically the width of a mobile viewport). Layouts should adapt responsively, and text should reflow to fit the screen.

Users can increase letter, word, line, and paragraph spacing without cutting off content or breaking functionality.

Tooltips and similar content should stay visible, be easy to dismiss (usually with the Esc key), and let users select and interact with the text.