diff --git a/files/templates/CHRISTMAS/submission.html b/files/templates/CHRISTMAS/submission.html
index 3739578bf1..93c3eec283 100644
--- a/files/templates/CHRISTMAS/submission.html
+++ b/files/templates/CHRISTMAS/submission.html
@@ -104,7 +104,7 @@
 
 {% block subHeader %}
 	<div class="relative max-w-screen-2xl mx-auto px-4 py-4 grid grid-cols-12 rounded-t {% if p.award_count("lights") %}lights{% endif %}">
-		<div class="absolute top-0 left-0 w-full h-full bg-gradient-to-t from-gray-300 to-gray-200 rounded-t sub-header-shadow"></div>
+		<div class="absolute top-0 left-0 w-full h-full bg-gradient-to-t from-gray-300 to-gray-200 dark:bg-none dark:bg-gray-800 rounded-t sub-header-shadow dark:border-b dark:border-gray-700"></div>
 		<div class="relative col-span-full flex items-center">
 			<div>
 				<h1 class="font-bold text-xl font-heading leading-normal mb-0">