diff --git a/res/themes/dark/css/_dark.scss b/res/themes/dark/css/_dark.scss
index 31e9aa7434..3122951034 100644
--- a/res/themes/dark/css/_dark.scss
+++ b/res/themes/dark/css/_dark.scss
@@ -71,6 +71,11 @@ $avatar-bg-color: $bg-color;
 
 $h3-color: $primary-fg-color;
 
+$dialog-title-fg-color: #454545;
+$dialog-backdrop-color: #000;
+$dialog-shadow-color: rgba(0, 0, 0, 0.48);
+$dialog-close-fg-color: #9fa9ba;
+
 $dialog-background-bg-color: $header-panel-bg-color;
 $lightbox-background-bg-color: #000;