diff --git a/layouts/partials/custom_head.html b/layouts/partials/custom_head.html
new file mode 100644
index 0000000..046652b
--- /dev/null
+++ b/layouts/partials/custom_head.html
@@ -0,0 +1,17 @@
+<!-- A partial to be overwritten by the user.
+  Simply place a custom_head.html into
+  your local /layouts/partials-directory -->
+
+<style>
+  pre {
+    color:#f8f8f2;
+    background-color:#272822;
+    -moz-tab-size:4;
+    -o-tab-size:4;
+    tab-size:4;
+  }
+  code.language-asciidoc{
+    background-color: unset;
+    color: unset;
+  }
+</style>
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