Index: wp-admin/custom-background.php
===================================================================
--- wp-admin/custom-background.php	(revision 19602)
+++ wp-admin/custom-background.php	(working copy)
@@ -304,7 +304,7 @@
 <td><fieldset><legend class="screen-reader-text"><span><?php _e( 'Background Color' ); ?></span></legend>
 <?php $show_clear = get_background_color() ? '' : ' style="display:none"'; ?>
 <input type="text" name="background-color" id="background-color" value="#<?php echo esc_attr(get_background_color()) ?>" />
-<a class="hide-if-no-js" href="#" id="pickcolor"><?php _e('Select a Color'); ?></a> <span<?php echo $show_clear; ?> class="hide-if-no-js" id="clearcolor"> (<a href="#"><?php _e( 'Clear' ); ?></a>)</span>
+<input id="pickcolor" type="button" class="pickcolor button hide-if-no-js" value="<?php esc_attr_e( 'Select a Color', 'twentyeleven' ); ?>" /><span<?php echo $show_clear; ?> class="hide-if-no-js" id="clearcolor"> (<a href="#"><?php _e( 'Clear' ); ?></a>)</span>
 <div id="colorPickerDiv" style="z-index: 100; background:#eee; border:1px solid #ccc; position:absolute; display:none;"></div>
 </fieldset></td>
 </tr>