Index: admin_menu.module
===================================================================
--- admin_menu.module	(revision 847)
+++ admin_menu.module	(working copy)
@@ -101,7 +101,7 @@
 
   $path = drupal_get_path('module', 'admin_menu');
   drupal_add_css($path . '/admin_menu.css', 'module', 'all', FALSE);
-  if ($user->uid == 1) {
+  if ($user->uid == 1 && variable_get(admin_menu_uid1_red, 1) === 1) {
     drupal_add_css($path . '/admin_menu.color.css', 'module', 'all', FALSE);
   }
   // Performance: Defer execution.
Index: admin_menu.inc
===================================================================
--- admin_menu.inc	(revision 847)
+++ admin_menu.inc	(working copy)
@@ -388,6 +388,12 @@
     '#default_value' => variable_get('admin_menu_position_fixed', 0),
     '#description' => t('If enabled, the administration menu is always displayed at the top of the browser viewport (even after the page is scrolled). <strong>Note: In some browsers, this setting results in a malformed page, an invisible cursor, non-selectable elements in forms, or other issues. Disable this option if these issues occur.</strong>'),
   );
+  $form['admin_menu_uid1_red'] = array(
+    '#type' => 'checkbox',
+    '#title' => t('Show red menu for admin user'),
+    '#default_value' => variable_get('admin_menu_uid1_red', 1),
+    '#description' => t('If enabled, the administration menu is displayed with a reddish cast for the admin user (uid 1).</strong>'),
+  );
   $form['tweaks'] = array(
     '#type' => 'fieldset',
     '#title' => t('Advanced settings'),