Guidelines

UX writing, accessibility, forms, error messages, and punctuation standards for Duo products.

Writing guidelines

Voice, tone, clarity, and accessibility-oriented UX writing standards.
Accessibility guidelines

WCAG 2.2 AA, semantic HTML, keyboard, ARIA, forms, and contrast.
Form guidelines

Native controls, duo-field markup order, helpers, errors, and accessibility.
Error messages

Clear, empathetic, actionable error copy that helps users recover quickly.
Punctuation

Grammar-based punctuation rules for product copy, including symbols and spacing.