diff --git a/roles/web_server/templates/nginx-default.j2 b/roles/web_server/templates/nginx-default.j2
index 89711a3b278fc3d6ecea3fb6134e0105969d2b44..d2b3025423318d75d6e44214fb644ba381b6917d 100644
--- a/roles/web_server/templates/nginx-default.j2
+++ b/roles/web_server/templates/nginx-default.j2
@@ -35,4 +35,11 @@ server {
         # Always point user to the same index page.
         try_files $uri /index.html;
     }
+
+    {% if environment_indicator -%}
+    # Show environment indicator on HTML pages.
+    sub_filter_types text/html;
+    sub_filter_once on;
+    sub_filter "</body>" "<div id='website-environment' style='background-color: {{ environment_indicator.background_colour }}; width: 100%; text-align: center; position: fixed; bottom: 5px; color: {{ environment_indicator.text_colour }}; font-weight: bold; z-index: 999999;'>{{ environment_indicator.text }}</div></body>";
+    {% endif -%}
 }