diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -9,7 +9,7 @@
   'names' => array(
     'conpherence.pkg.css' => '2f25eb4f',
     'conpherence.pkg.js' => '020aebcf',
-    'core.pkg.css' => 'ac619266',
+    'core.pkg.css' => '112931ab',
     'core.pkg.js' => '2eeda9e0',
     'dark-console.pkg.js' => '187792c2',
     'differential.pkg.css' => '94bb10ca',
@@ -146,7 +146,7 @@
     'rsrc/css/phui/phui-cms.css' => '8c05c41e',
     'rsrc/css/phui/phui-comment-form.css' => '3c6679a3',
     'rsrc/css/phui/phui-comment-panel.css' => 'ec4e31c0',
-    'rsrc/css/phui/phui-crumbs-view.css' => '614f43cf',
+    'rsrc/css/phui/phui-crumbs-view.css' => 'a6a337a4',
     'rsrc/css/phui/phui-curtain-object-ref-view.css' => '51d93266',
     'rsrc/css/phui/phui-curtain-view.css' => '68c5efb6',
     'rsrc/css/phui/phui-document-pro.css' => 'b9613a10',
@@ -838,7 +838,7 @@
     'phui-cms-css' => '8c05c41e',
     'phui-comment-form-css' => '3c6679a3',
     'phui-comment-panel-css' => 'ec4e31c0',
-    'phui-crumbs-view-css' => '614f43cf',
+    'phui-crumbs-view-css' => 'a6a337a4',
     'phui-curtain-object-ref-view-css' => '51d93266',
     'phui-curtain-view-css' => '68c5efb6',
     'phui-document-summary-view-css' => 'b068eed1',
diff --git a/src/applications/project/controller/PhabricatorProjectController.php b/src/applications/project/controller/PhabricatorProjectController.php
--- a/src/applications/project/controller/PhabricatorProjectController.php
+++ b/src/applications/project/controller/PhabricatorProjectController.php
@@ -137,8 +137,8 @@
               break;
           }
         }
-
-        $crumbs->addTextCrumb($ancestor->getName(), $crumb_uri);
+        $archived = $ancestor->isArchived();
+        $crumbs->addTextCrumb($ancestor->getName(), $crumb_uri, $archived);
       }
     }
 
diff --git a/src/view/phui/PHUICrumbView.php b/src/view/phui/PHUICrumbView.php
--- a/src/view/phui/PHUICrumbView.php
+++ b/src/view/phui/PHUICrumbView.php
@@ -4,6 +4,7 @@
 
   private $name;
   private $href;
+  private $strikethrough = false;
   private $icon;
   private $isLastCrumb;
   private $workflow;
@@ -54,6 +55,17 @@
     return $this;
   }
 
+  /**
+   * Render this crumb as strike-through.
+   *
+   * @param bool $strikethrough True to render the crumb strike-through.
+   * @return $this
+   */
+  public function setStrikethrough(bool $strikethrough) {
+    $this->strikethrough = $strikethrough;
+    return $this;
+  }
+
   public function setIcon($icon) {
     $this->icon = $icon;
     return $this;
@@ -90,6 +102,10 @@
         ->setIcon($this->icon);
     }
 
+    if ($this->strikethrough) {
+      $classes[] = 'phui-crumb-strikethrough';
+    }
+
     // Surround the crumb name with spaces so that double clicking it only
     // selects the crumb itself.
     $name = array(' ', $this->name);
diff --git a/src/view/phui/PHUICrumbsView.php b/src/view/phui/PHUICrumbsView.php
--- a/src/view/phui/PHUICrumbsView.php
+++ b/src/view/phui/PHUICrumbsView.php
@@ -15,15 +15,18 @@
    * Convenience method for adding a simple crumb with just text, or text and
    * a link.
    *
-   * @param string  $text Text of the crumb.
+   * @param string $text Text of the crumb.
    * @param string $href (optional) href for the crumb.
+   * @param bool   $strikethrough (optional) Strikethrough (=inactive/disabled)
+   *               for the crumb.
    * @return $this
    */
-  public function addTextCrumb($text, $href = null) {
+  public function addTextCrumb($text, $href = null, $strikethrough = false) {
     return $this->addCrumb(
       id(new PHUICrumbView())
         ->setName($text)
-        ->setHref($href));
+        ->setHref($href)
+        ->setStrikethrough($strikethrough));
   }
 
   public function addCrumb(PHUICrumbView $crumb) {
diff --git a/webroot/rsrc/css/phui/phui-crumbs-view.css b/webroot/rsrc/css/phui/phui-crumbs-view.css
--- a/webroot/rsrc/css/phui/phui-crumbs-view.css
+++ b/webroot/rsrc/css/phui/phui-crumbs-view.css
@@ -71,6 +71,10 @@
   margin: 0 4px;
 }
 
+.phui-crumb-strikethrough > .phui-crumb-name {
+  text-decoration: line-through;
+}
+
 .device-phone .phui-crumb-icon {
   margin-left: 7px;
 }