Index: src/__celerity_resource_map__.php
===================================================================
--- src/__celerity_resource_map__.php
+++ src/__celerity_resource_map__.php
@@ -1790,6 +1790,20 @@
     ),
     'disk' => '/rsrc/js/core/behavior-global-drag-and-drop.js',
   ),
+  'javelin-behavior-harbormaster-reorder-steps' =>
+  array(
+    'uri' => '/res/035fe63d/rsrc/js/application/harbormaster/behavior-reorder-steps.js',
+    'type' => 'js',
+    'requires' =>
+    array(
+      0 => 'javelin-behavior',
+      1 => 'javelin-stratcom',
+      2 => 'javelin-workflow',
+      3 => 'javelin-dom',
+      4 => 'phabricator-draggable-list',
+    ),
+    'disk' => '/rsrc/js/application/harbormaster/behavior-reorder-steps.js',
+  ),
   'javelin-behavior-herald-rule-editor' =>
   array(
     'uri' => '/res/77a0c945/rsrc/js/application/herald/herald-rule-editor.js',
Index: src/__phutil_library_map__.php
===================================================================
--- src/__phutil_library_map__.php
+++ src/__phutil_library_map__.php
@@ -1984,6 +1984,7 @@
     'PhabricatorTypeaheadCommonDatasourceController' => 'applications/typeahead/controller/PhabricatorTypeaheadCommonDatasourceController.php',
     'PhabricatorTypeaheadDatasourceController' => 'applications/typeahead/controller/PhabricatorTypeaheadDatasourceController.php',
     'PhabricatorTypeaheadResult' => 'applications/typeahead/storage/PhabricatorTypeaheadResult.php',
+    'PhabricatorUIConfigOptions' => 'applications/config/option/PhabricatorUIConfigOptions.php',
     'PhabricatorUIExample' => 'applications/uiexample/examples/PhabricatorUIExample.php',
     'PhabricatorUIExampleRenderController' => 'applications/uiexample/controller/PhabricatorUIExampleRenderController.php',
     'PhabricatorUIListFilterExample' => 'applications/uiexample/examples/PhabricatorUIListFilterExample.php',
@@ -4527,6 +4528,7 @@
     'PhabricatorTwoColumnExample' => 'PhabricatorUIExample',
     'PhabricatorTypeaheadCommonDatasourceController' => 'PhabricatorTypeaheadDatasourceController',
     'PhabricatorTypeaheadDatasourceController' => 'PhabricatorController',
+    'PhabricatorUIConfigOptions' => 'PhabricatorApplicationConfigOptions',
     'PhabricatorUIExampleRenderController' => 'PhabricatorController',
     'PhabricatorUIListFilterExample' => 'PhabricatorUIExample',
     'PhabricatorUINotificationExample' => 'PhabricatorUIExample',
Index: src/applications/config/option/PhabricatorUIConfigOptions.php
===================================================================
--- /dev/null
+++ src/applications/config/option/PhabricatorUIConfigOptions.php
@@ -0,0 +1,32 @@
+<?php
+
+final class PhabricatorUIConfigOptions
+  extends PhabricatorApplicationConfigOptions {
+
+  public function getName() {
+    return pht("User Interface");
+  }
+
+  public function getDescription() {
+    return pht("Configure the Phabricator UI, including colors.");
+  }
+
+  public function getOptions() {
+    $manifest = PHUIIconView::getSheetManifest('main-header');
+
+    $options = array();
+    foreach (array_keys($manifest) as $sprite_name) {
+      $key = substr($sprite_name, strlen('main-header-'));
+      $options[$key] = $key;
+    }
+
+    return array(
+      $this->newOption('ui.header-color', 'enum', 'dark')
+        ->setDescription(
+          pht(
+            'Sets the color of the main header.'))
+        ->setEnumOptions($options),
+    );
+  }
+
+}
Index: src/view/page/menu/PhabricatorMainMenuView.php
===================================================================
--- src/view/page/menu/PhabricatorMainMenuView.php
+++ src/view/page/menu/PhabricatorMainMenuView.php
@@ -68,8 +68,7 @@
     $classes = array();
     $classes[] = 'phabricator-main-menu';
     $classes[] = 'sprite-main-header';
-    // TODO: Let admins or users set header
-    $classes[] = 'main-header-dark';
+    $classes[] = 'main-header-'.PhabricatorEnv::getEnvConfig('ui.header-color');
 
     return phutil_tag(
       'div',