diff --git a/agaric/templates/layout/node--full.html.twig b/agaric/templates/layout/node--full.html.twig
index 0d1de85..edd1896 100644
--- a/agaric/templates/layout/node--full.html.twig
+++ b/agaric/templates/layout/node--full.html.twig
@@ -89,7 +89,7 @@
     {% set classes = classes|merge(['is-dark']) %}
   {% endif %}
   {# Header hero region #}
-  <section{{ attributes.addClass(classes) }}>
+  <section{{ attributes.addClass(classes) }} data-headerbg="transparent">
     <div class="hero-body">
       <div class="container">
         <h1 class="title is-2">{{ label }}</h1>