diff --git a/customize.dist/src/less2/pages/page-assert.less b/customize.dist/src/less2/pages/page-assert.less
new file mode 100644
index 000000000..1d1442ff5
--- /dev/null
+++ b/customize.dist/src/less2/pages/page-assert.less
@@ -0,0 +1,13 @@
+@import (reference) "../include/colortheme-all.less";
+@import (reference) "../include/font.less";
+
+html, body {
+    .font_main();
+    height: 100%;
+    margin: 0px;
+    padding: 0px;
+    background-color: @cp_static-bg !important;
+    color: @cryptpad_text_col;
+    font-family: "IBM Plex Mono";
+}
+
diff --git a/www/assert/main.js b/www/assert/main.js
index db417c761..f40a8e006 100644
--- a/www/assert/main.js
+++ b/www/assert/main.js
@@ -13,6 +13,7 @@ define([
     '/common/outer/login-block.js',
 
     '/bower_components/tweetnacl/nacl-fast.min.js',
+    'less!/customize/src/less2/pages/page-assert.less',
 ], function ($, Hyperjson, Sortify, Drive, Test, Hash, Util, Thumb, Wire, Flat, MediaTag, Block) {
     window.Hyperjson = Hyperjson;
     window.Sortify = Sortify;