diff --git a/src/resources/projects/book/templates/_quarto.ejs.yml b/src/resources/projects/book/templates/_quarto.ejs.yml
index 4ed8997690..f8ecfd6009 100644
--- a/src/resources/projects/book/templates/_quarto.ejs.yml
+++ b/src/resources/projects/book/templates/_quarto.ejs.yml
@@ -15,7 +15,9 @@ bibliography: references.bib
 
 format:
   html:
-    theme: cosmo
+    theme:
+      - cosmo
+      - brand
   pdf:
     documentclass: scrreprt
 
diff --git a/src/resources/projects/website/templates/_quarto.ejs.yml b/src/resources/projects/website/templates/_quarto.ejs.yml
index c82eca2456..735e209c32 100644
--- a/src/resources/projects/website/templates/_quarto.ejs.yml
+++ b/src/resources/projects/website/templates/_quarto.ejs.yml
@@ -11,7 +11,9 @@ website:
 
 format:
   html:
-    theme: cosmo
+    theme:
+      - cosmo
+      - brand
     css: styles.css
     toc: true
 
diff --git a/src/resources/projects/website/templates/blog/_quarto-blog.ejs.yml b/src/resources/projects/website/templates/blog/_quarto-blog.ejs.yml
index bd4bee2bd9..13a927599d 100644
--- a/src/resources/projects/website/templates/blog/_quarto-blog.ejs.yml
+++ b/src/resources/projects/website/templates/blog/_quarto-blog.ejs.yml
@@ -12,7 +12,9 @@ website:
         href: https://twitter.com
 format:
   html:
-    theme: cosmo
+    theme:
+      - cosmo
+      - brand
     css: styles.css
 
 <% if(editor){ %>editor: <%= editor %><% } %>