[Zope] tal:repeat

I am using this code to generate a navigation bar. I need to have a different bgcolor attribute on the td if we're already in that folder. In other words, I need to do tal:attributes="bgcolor string:red" but only where folder == here. The condition only applies to the bgcolor attribute so I'm not sure where it goes. Any ideas? <table> <tr tal:define="subfolders python:container.objectValues('Folder')"> <td tal:repeat="folder subfolders" bgcolor="yellow"> <span tal:replace="folder/title">Title</span> </td> </tr> </table>