W3C Web Content Accessibility Guidelines 1.0 Conformance Logos
WCAG 2.0 was published in December 2008, and is recommended over WCAG 1.0.
See
Web Content
Accessibility Guidelines (WCAG) Overview
Please send comments about this page to:
wai-wcag-editor@w3.org
Last modified:
$Date: 2025/04/22 11:49:44 $
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
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Put the following HTML markup in your page:
title="Explanation of Level A Conformance">src="http://www.w3.org/WAI/wcag1A"
alt="Level A conformance icon,
W3C-WAI Web Content Accessibility Guidelines 1.0">
If you would like to use the blue logo, append "-blue" to the image src.
Put the following HTML markup in your page:
title="Explanation of Level Double-A Conformance">
src="http://www.w3.org/WAI/wcag1AA"
alt="Level Double-A conformance icon,
W3C-WAI Web Content Accessibility Guidelines 1.0">
If you would like to use the blue logo, append "-blue" to the image src.
Put the following HTML markup in your page:
title="Explanation of Level Triple-A Conformance">src="http://www.w3.org/WAI/wcag1AAA"
alt="Level Triple-A conformance icon,
W3C-WAI Web Content Accessibility Guidelines 1.0">
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.