What level is WCAG 1.4.8?

Level AAA. It sits under guideline 1.4 Distinguishable of the Perceivable principle.

What are common ways pages fail WCAG 1.4.8?

Fixed-pixel max-widths that produce 30em+ measure on desktop. Body copy is justified, creating uneven rivers of whitespace.

How do I fix WCAG 1.4.8 issues?

Cap measure at ~80 characters for body copy. Use `text-align: left` (or `start`) rather than justify. Set line-height to at least 1.5 on paragraph text.

1.4 Distinguishable · Perceivable

WCAG 1.4.8 Visual Presentation

Level AAA

Blocks of text must offer user-controlled colours, line lengths under 80 characters, no full-justification, line spacing of 1.5, and the ability to read without horizontal scrolling at 200% zoom.

Common failures

Fixed-pixel max-widths that produce 30em+ measure on desktop.
Body copy is justified, creating uneven rivers of whitespace.

How to fix

Cap measure at ~80 characters for body copy.
Use `text-align: left` (or `start`) rather than justify.
Set line-height to at least 1.5 on paragraph text.

Related criteria

WCAG 1.4.4 Resize Text Level AA
WCAG 1.4.12 Text Spacing Level AA