Index: trac/templates/macros.html
===================================================================
--- trac/templates/macros.html	(revision 5758)
+++ trac/templates/macros.html	(working copy)
@@ -231,9 +231,9 @@
       </tr>
     </table>
     <p class="percent">${percent is None and '%d%%' % stats.done_percent or percent}</p>
-    <dl py:if="legend">
+    <dl class="progress" py:if="legend">
       <py:for each="idx, interval in enumerate(stats.intervals)">
-        <dt>${interval.title.capitalize()} ${stats.unit}s:</dt>
+        <dt class="$interval.css_class">${interval.title.capitalize()} ${stats.unit}s:</dt>
         <dd><a href="${interval_hrefs[idx]}">${interval.count}</a></dd>
       </py:for>
       <py:if test="stats_href">
Index: trac/web/chrome.py
===================================================================
--- trac/web/chrome.py	(revision 5758)
+++ trac/web/chrome.py	(working copy)
@@ -561,6 +561,7 @@
         if content_type is None:
             content_type = 'text/html'
         method = {'text/html': 'xhtml',
+                  'text/css': 'text',
                   'text/plain': 'text'}.get(content_type, 'xml')
 
         template = self.load_template(filename, method=method)