Index: wp-admin/themes.php
===================================================================
--- wp-admin/themes.php	(revision 26748)
+++ wp-admin/themes.php	(working copy)
@@ -192,7 +192,7 @@
  */
 
 foreach ( $themes as $theme ) : ?>
-<div class="theme<?php if ( $theme['active'] ) echo ' active'; ?>">
+<div class="theme<?php if ( $theme['active'] ) echo ' active'; ?> tabindex="0" aria-describedby="<?php echo $theme['id']; ?>-action <?php echo $theme['id']; ?>-name">
 	<?php if ( ! empty( $theme['screenshot'][0] ) ) { ?>
 		<div class="theme-screenshot">
 			<img src="<?php echo $theme['screenshot'][0]; ?>" alt="" />
@@ -204,7 +204,7 @@
 	<div class="theme-author"><?php printf( __( 'By %s' ), $theme['author'] ); ?></div>
 
 	<?php if ( $theme['active'] ) { ?>
-		<h3 class="theme-name"><span><?php _ex( 'Active:', 'theme' ); ?></span> <?php echo $theme['name']; ?></h3>
+		<h3 class="theme-name" id="<?php echo $theme['id']; ?>-name"><span><?php _ex( 'Active:', 'theme' ); ?></span> <?php echo $theme['name']; ?></h3>
 	<?php } else { ?>
 		<h3 class="theme-name"><?php echo $theme['name']; ?></h3>
 	<?php } ?>
@@ -213,10 +213,10 @@
 
 	<?php if ( $theme['active'] ) { ?>
 		<?php if ( $theme['actions']['customize'] ) { ?>
-			<a class="button button-primary customize load-customize hide-if-no-customize" href="<?php echo $theme['actions']['customize']; ?>"><?php _e( 'Customize' ); ?></a>
+			<a class="button button-primary customize load-customize hide-if-no-customize" href="<?php echo $theme['actions']['customize']; ?>" id="<?php echo $theme['id']; ?>-action"><?php _e( 'Customize' ); ?></a>
 		<?php } ?>
 	<?php } else { ?>
-		<a class="button button-primary activate" href="<?php echo $theme['actions']['activate']; ?>"><?php _e( 'Activate' ); ?></a>
+		<a class="button button-primary activate" href="<?php echo $theme['actions']['activate']; ?>" id="<?php echo $theme['id']; ?>"><?php _e( 'Activate' ); ?></a>
 		<a class="button button-secondary load-customize hide-if-no-customize" href="<?php echo $theme['actions']['customize']; ?>"><?php _e( 'Live Preview' ); ?></a>
 		<a class="button button-secondary hide-if-customize" href="<?php echo $theme['actions']['preview']; ?>"><?php _e( 'Preview' ); ?></a>
 	<?php } ?>