WCAG 3.0 is an active W3C Working Draft in development by the AGWG. Requirements, assertions, the conformance model and reporting tiers are still being developed and may change. The latest published draft is the 10 September 2026 Working Draft; this site follows the editors’ draft, which also includes exploratory provisions.
developingSupplemental requirement
Errors Indicated In Multiple Ways
Group: error-handling • Guideline: correct-errors
Summary in Plain English
An error has to be marked in at least two of three ways: a symbol used consistently throughout, a distinguishing colour, and a textual indication.
Why It Matters
Colour alone is invisible to people with colour vision deficiencies and disappears in high-contrast modes. A second, redundant signal means the error still registers.
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Examples from the Draft
Worked examples the W3C editors wrote into the provision itself, not
examples invented here.
An example of a “textual indication” would be to add “Error: ” before the error description.
Error messages are visually indicated using at least two of the following:
* a symbol that is consistent throughout the conformance scope
* color that differentiates the error message from surrounding content
* a textual indication
:::example
An example of a "textual indication" would be to add "Error: " before the error description.
:::