To further promote accessibility on the Web, W3C has introduced the Web Content Accessibility Guidelines (WCAG) Conformance Logos. Content providers can use these logos on their sites to indicate a claim of conformance to a specified conformance level of the Web Content Accessibility Guidelines 1.0. We expect that use of these logos on conformant sites will help raise awareness of accessibility issues.
Conformance to WCAG 1.0 is defined in section 5 of the specification. Here is the excerpt that defines the conformance levels:
- Conformance Level "A": all Priority 1 checkpoints are satisfied;
- Conformance Level "Double-A": all Priority 1 and 2 checkpoints are satisfied;
- Conformance Level "Triple-A": all Priority 1, 2, and 3 checkpoints are satisfied;
Please refer to WCAG 1.0 for more information about information required in a conformance claim.
First, decide which of the following levels of conformance you wish to claim for your page:
| level A | Double-A | Triple-A |
|---|---|---|
 (gif, svg, eps) |
 (gif, svg, eps) |
 (gif, svg, eps) |
 (gif, svg, eps) |
 (gif, svg, eps) |
 (gif, svg, eps) |
Put the following HTML markup in your page:
<a href="http://www.w3.org/WAI/WCAG1A-Conformance"
title="Explanation of Level A Conformance">
<img height="32" width="88"
src="http://www.w3.org/WAI/wcag1A"
alt="Level A conformance icon,
W3C-WAI Web Content Accessibility Guidelines 1.0"></a>
If you would like to use the blue logo, append "-blue" to the image src.
Put the following HTML markup in your page:
<a href="http://www.w3.org/WAI/WCAG1AA-Conformance"
title="Explanation of Level Double-A Conformance">
<img height="32" width="88"
src="http://www.w3.org/WAI/wcag1AA"
alt="Level Double-A conformance icon,
W3C-WAI Web Content Accessibility Guidelines 1.0"></a>
If you would like to use the blue logo, append "-blue" to the image src.
Put the following HTML markup in your page:
<a href="http://www.w3.org/WAI/WCAG1AAA-Conformance"
title="Explanation of Level Triple-A Conformance">
<img height="32" width="88"
src="http://www.w3.org/WAI/wcag1AAA"
alt="Level Triple-A conformance icon,
W3C-WAI Web Content Accessibility Guidelines 1.0"></a>
If you would like to use the blue logo, append "-blue" to the image src.
By default, a conformance icon refers to a single page. If the claim is meant to apply to include more than one page, the conformance icon must be accompanied by explicit scope information explaining which pages are covered by the claim.
Content providers are solely responsible for the use of these logos. Before using these logos as part of a conformance claim, we recommend that the provider be familiar with the Web Content Accessibility Guidelines 1.0 and use a variety of review methods to ensure that any page using this logo meets the conformance level claimed. Providers should also ensure that anyone maintaining or updating the site is familiar with logo use, and either re-reviews the page or removes the logo from the page if they are unsure whether it still meets a specified conformance level.
Please note that use of this logo is not conditional on an automated test. There is as yet no tool that can perform a completely automatic assessment on the checkpoints in the guidelines, and fully automatic testing may remain difficult or impossible. For instance, some checkpoints rely on an interpretation of what "important" information is, or whether the text equivalent for a non-text element is accurate.
It is also possible for automated accessibility checkers to register "false negatives" or "false positives" due to the type of mark-up on a page. For these reasons, the logos on this page are used to indicate only a claim of conformance made by the author of a page, not a machine-validated conformance.
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