diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -108,9 +108,9 @@
     'rsrc/css/core/syntax.css' => '9fd11da8',
     'rsrc/css/core/z-index.css' => '57ddcaa2',
     'rsrc/css/diviner/diviner-shared.css' => 'aa3656aa',
-    'rsrc/css/font/font-aleo.css' => 'b61d3062',
+    'rsrc/css/font/font-aleo.css' => '8bdb2835',
     'rsrc/css/font/font-awesome.css' => 'd2fc4e8d',
-    'rsrc/css/font/font-lato.css' => '5ab1a46a',
+    'rsrc/css/font/font-lato.css' => 'c7ccd872',
     'rsrc/css/font/phui-font-icon-base.css' => 'ecbbb4c2',
     'rsrc/css/layout/phabricator-filetree-view.css' => 'fccf9f82',
     'rsrc/css/layout/phabricator-hovercard-view.css' => '1239cd52',
@@ -158,10 +158,12 @@
     'rsrc/css/sprite-projects.css' => 'e5ad842a',
     'rsrc/css/sprite-tokens.css' => '4f399012',
     'rsrc/externals/font/aleo/aleo-bold.eot' => 'd3d3bed7',
+    'rsrc/externals/font/aleo/aleo-bold.svg' => '45899c8e',
     'rsrc/externals/font/aleo/aleo-bold.ttf' => '4b08bef0',
     'rsrc/externals/font/aleo/aleo-bold.woff' => '93b513a1',
     'rsrc/externals/font/aleo/aleo-bold.woff2' => '75fbf322',
     'rsrc/externals/font/aleo/aleo-regular.eot' => 'a4e29e2f',
+    'rsrc/externals/font/aleo/aleo-regular.svg' => '42a86f7a',
     'rsrc/externals/font/aleo/aleo-regular.ttf' => '751e7479',
     'rsrc/externals/font/aleo/aleo-regular.woff' => 'c3744be9',
     'rsrc/externals/font/aleo/aleo-regular.woff2' => '851aa0ee',
@@ -170,18 +172,22 @@
     'rsrc/externals/font/fontawesome/fontawesome-webfont.woff' => '427fe363',
     'rsrc/externals/font/fontawesome/fontawesome-webfont.woff2' => 'a9897054',
     'rsrc/externals/font/lato/lato-bold.eot' => '99fbcf8c',
+    'rsrc/externals/font/lato/lato-bold.svg' => '2aa83045',
     'rsrc/externals/font/lato/lato-bold.ttf' => '0a7141f7',
     'rsrc/externals/font/lato/lato-bold.woff' => 'f5db2061',
     'rsrc/externals/font/lato/lato-bold.woff2' => '37a94ecd',
     'rsrc/externals/font/lato/lato-bolditalic.eot' => 'b93389d0',
+    'rsrc/externals/font/lato/lato-bolditalic.svg' => '5442e1ef',
     'rsrc/externals/font/lato/lato-bolditalic.ttf' => 'dad31252',
     'rsrc/externals/font/lato/lato-bolditalic.woff' => 'e53bcf47',
     'rsrc/externals/font/lato/lato-bolditalic.woff2' => 'd035007f',
     'rsrc/externals/font/lato/lato-italic.eot' => '6a903f5d',
+    'rsrc/externals/font/lato/lato-italic.svg' => '0dc7cf2f',
     'rsrc/externals/font/lato/lato-italic.ttf' => '629f64f0',
     'rsrc/externals/font/lato/lato-italic.woff' => '678dc4bb',
     'rsrc/externals/font/lato/lato-italic.woff2' => '7c8dd650',
     'rsrc/externals/font/lato/lato-regular.eot' => '848dfb1e',
+    'rsrc/externals/font/lato/lato-regular.svg' => 'cbd5fd6b',
     'rsrc/externals/font/lato/lato-regular.ttf' => 'e270165b',
     'rsrc/externals/font/lato/lato-regular.woff' => '13d39fe2',
     'rsrc/externals/font/lato/lato-regular.woff2' => '57a9f742',
@@ -255,6 +261,7 @@
     'rsrc/favicons/favicon-16x16.png' => 'ee2523ac',
     'rsrc/favicons/favicon-32x32.png' => 'b6a8150e',
     'rsrc/favicons/favicon-96x96.png' => '8f7ea177',
+    'rsrc/favicons/mask-icon.svg' => '0460cb1f',
     'rsrc/image/BFCFDA.png' => 'd5ec91f4',
     'rsrc/image/actions/edit.png' => '2fc41442',
     'rsrc/image/avatar.png' => '3eb28cd9',
@@ -529,9 +536,9 @@
     'diffusion-readme-css' => '2106ea08',
     'diffusion-source-css' => '075ba788',
     'diviner-shared-css' => 'aa3656aa',
-    'font-aleo' => 'b61d3062',
+    'font-aleo' => '8bdb2835',
     'font-fontawesome' => 'd2fc4e8d',
-    'font-lato' => '5ab1a46a',
+    'font-lato' => 'c7ccd872',
     'global-drag-and-drop-css' => '697324ad',
     'harbormaster-css' => 'b0758ca5',
     'herald-css' => '826075fa',
@@ -1206,9 +1213,6 @@
       'javelin-vector',
       'javelin-dom',
     ),
-    '5ab1a46a' => array(
-      'phui-fontkit-css',
-    ),
     '5b2e3e2b' => array(
       'javelin-stratcom',
       'javelin-request',
@@ -1506,6 +1510,9 @@
       'javelin-request',
       'javelin-typeahead-source',
     ),
+    '8bdb2835' => array(
+      'phui-fontkit-css',
+    ),
     '8ce821c5' => array(
       'phabricator-notification',
       'javelin-stratcom',
@@ -1717,9 +1724,6 @@
       'javelin-dom',
       'javelin-util',
     ),
-    'b61d3062' => array(
-      'phui-fontkit-css',
-    ),
     'b6993408' => array(
       'javelin-behavior',
       'javelin-stratcom',
@@ -1775,6 +1779,9 @@
       'phabricator-keyboard-shortcut',
       'conpherence-thread-manager',
     ),
+    'c7ccd872' => array(
+      'phui-fontkit-css',
+    ),
     'c8e57404' => array(
       'javelin-behavior',
       'javelin-dom',
diff --git a/src/applications/celerity/controller/CelerityResourceController.php b/src/applications/celerity/controller/CelerityResourceController.php
--- a/src/applications/celerity/controller/CelerityResourceController.php
+++ b/src/applications/celerity/controller/CelerityResourceController.php
@@ -125,6 +125,7 @@
       'css' => 'text/css; charset=utf-8',
       'js'  => 'text/javascript; charset=utf-8',
       'png' => 'image/png',
+      'svg' => 'image/svg+xml',
       'gif' => 'image/gif',
       'jpg' => 'image/jpeg',
       'swf' => 'application/x-shockwave-flash',
diff --git a/src/applications/celerity/resources/CelerityResourcesOnDisk.php b/src/applications/celerity/resources/CelerityResourcesOnDisk.php
--- a/src/applications/celerity/resources/CelerityResourcesOnDisk.php
+++ b/src/applications/celerity/resources/CelerityResourcesOnDisk.php
@@ -33,6 +33,7 @@
       'jpg',
       'gif',
       'swf',
+      'svg',
       'woff',
       'woff2',
       'ttf',
diff --git a/src/view/page/PhabricatorBarePageView.php b/src/view/page/PhabricatorBarePageView.php
--- a/src/view/page/PhabricatorBarePageView.php
+++ b/src/view/page/PhabricatorBarePageView.php
@@ -75,6 +75,16 @@
                        'maximum-scale=1',
         ));
     }
+
+    $mask_icon = phutil_tag(
+      'link',
+      array(
+        'rel' => 'mask-icon',
+        'color' => '#3D4B67',
+        'href' => celerity_get_resource_uri(
+          '/rsrc/favicons/mask-icon.svg'),
+      ));
+
     $icon_tag_76 = phutil_tag(
       'link',
       array(
@@ -130,8 +140,9 @@
 
     $developer = PhabricatorEnv::getEnvConfig('phabricator.developer-mode');
     return hsprintf(
-      '%s%s%s%s%s%s%s%s',
+      '%s%s%s%s%s%s%s%s%s',
       $viewport_tag,
+      $mask_icon,
       $icon_tag_76,
       $icon_tag_120,
       $icon_tag_152,
diff --git a/webroot/rsrc/favicons/mask-icon.svg b/webroot/rsrc/favicons/mask-icon.svg
new file mode 100644
--- /dev/null
+++ b/webroot/rsrc/favicons/mask-icon.svg
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+  viewBox="0 0 152 152" style="enable-background:new 0 0 152 152;"
+  xml:space="preserve">
+<g>
+  <path d="M152,152c-50.7,0-101.3,0-152,0C0,101.3,0,50.7,0,0c50.7,0,101.3,0,152,
+    0C152,50.7,152,101.3,152,152z M36.3,109.2
+    c3,5.7,5.8,11.3,9,17.5c7.1-3,13.7-5.8,20.6-8.7c-2.2-6.8-4.1-12.8-6-18.7c4.3
+    -2.8,8.1-5.4,12.1-8c5,4.3,9.7,8.3,14.1,12.1
+    c5.7-5.6,10.8-10.6,16.1-15.8C98,82.6,94,77.8,90,73.2c3-4.4,5.6-8.2,8.2-11.9
+    c6.3,2,12.1,3.8,18.6,5.9c2.9-7,5.7-13.6,8.5-20.6
+    c-6.3-3.3-11.8-6.2-17.4-9.1c1-5,1.9-9.5,2.9-14.1c6.6-0.6,12.8-1.2,19.2-1.8
+    c0-4.4,0-8.1,0-12c-17.5,0-34.7,0-51.9,0
+    C77.5,43.6,52.7,77.3,9.6,79.4c0,17.2,0,34.4,0,52.3c3.8-0.2,7.2-0.4,10.9-0.6
+    c0.6-6.6,1.2-12.8,1.7-19.2
+    C27.1,111,31.6,110.1,36.3,109.2z M9.6,50.6c20.4,3.3,44.3-21.2,40.2-41c-13.3,
+    0-26.6,0-40.2,0C9.6,23.6,9.6,37.1,9.6,50.6z"/>
+</g>
+</svg>