Reference WCAG 2.0 wrt use of background images

Author: fantasai

css3-background/Overview.html

@@ -22,13 +22,13 @@
 
    <h1>CSS Backgrounds and Borders Module Level 3</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 20 October
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 27 October
     2010</h2>
 
    <dl>
     <dt>This version:
 
-    <dd><!--<a href="http://www.w3.org/TR/2010/WD-css3-background-20101020">http://www.w3.org/TR/2010/ED-css3-background-20101020</a>-->
+    <dd><!--<a href="http://www.w3.org/TR/2010/WD-css3-background-20101027">http://www.w3.org/TR/2010/ED-css3-background-20101027</a>-->
      <a
      href="http://dev.w3.org/csswg/css3-background">http://dev.w3.org/csswg/css3-background</a>
 
@@ -131,8 +131,7 @@ <h2 class="no-num no-toc" id=status>Status of this document</h2>
   <p>The following features are at-risk and may be dropped at the end of the
    CR period if there has not been enough interest from implementers:
    &lsquo;<a href="#box-decoration-break"><code
-   class=property>box-decoration-break</code></a>&rsquo;, &lsquo;<a
-   href="#box-shadow"><code class=property>box-shadow</code></a>&rsquo;.
+   class=property>box-decoration-break</code></a>&rsquo;
 
   <p>The CSS WG maintains an <a
    href="http://www.w3.org/Style/CSS/Tracker/products/11">issues list</a> for
@@ -594,6 +593,14 @@ <h3 id=the-background-image><span class=secno>3.3. </span>The &lsquo;<a
    class=css>background-color</code></a>&rsquo; that will preserve contrast
    with the text for when the image is unavailable.
 
+  <p>For accessibility reasons, authors should not use background images as
+   the sole method of conveying important information. See <a
+   href="http://www.w3.org/TR/2008/NOTE-WCAG20-TECHS-20081211/F3">Web Content
+   Accessibility Guideline F3</a> <a href="#WCAG20"
+   rel=biblioentry>[WCAG20]<!--{{WCAG20}}--></a>. Images are not accessible
+   in non-graphical presentations, and background images specifically might
+   be turned off in high-contrast display modes.
+
   <div class=example>
    <p>Some examples specifying background images:</p>
 
@@ -1886,7 +1893,8 @@ <h3 id=the-border-color><span class=secno>4.1. </span>The &lsquo;<a
     <tr>
      <th>Initial:
 
-     <td>currentColor
+     <td><a
+      href="http://www.w3.org/TR/css3-color/#currentcolor">currentColor</a>
 
     <tr>
      <th>Applies to:
@@ -4338,6 +4346,16 @@ <h3 class=no-num id=other-references>Other references</h3>
     </dd>
    <!---->
 
+   <dt id=WCAG20>[WCAG20]
+
+   <dd>Michael Cooper; et al. <a
+    href="http://www.w3.org/TR/2008/REC-WCAG20-20081211"><cite>Web Content
+    Accessibility Guidelines (WCAG) 2.0.</cite></a> 11 December 2008. W3C
+    Recommendation. URL: <a
+    href="http://www.w3.org/TR/2008/REC-WCAG20-20081211">http://www.w3.org/TR/2008/REC-WCAG20-20081211</a>
+    </dd>
+   <!---->
+
    <dt id=XML11>[XML11]
 
    <dd>Eve Maler; et al. <a

css3-background/Overview.src.html

@@ -302,6 +302,13 @@ <h3 id="the-background-image">The 'background-image' property</h3>
 ''background-color'' that will preserve contrast with the text for
 when the image is unavailable.
 
+<p>For accessibility reasons, authors should not use background images
+as the sole method of conveying important information.
+See <a href="http://www.w3.org/TR/2008/NOTE-WCAG20-TECHS-20081211/F3">Web
+Content Accessibility Guideline F3</a> [[WCAG20]]. Images are not
+accessible in non-graphical presentations, and background images
+specifically might be turned off in high-contrast display modes.
+
 <div class="example">
 <p>Some examples specifying background images:</p>
 <pre>