diff --git a/hugo_config/_default/theme_settings.toml b/hugo_config/_default/theme_settings.toml
index 3a6cd7e..c2aaf76 100644
--- a/hugo_config/_default/theme_settings.toml
+++ b/hugo_config/_default/theme_settings.toml
@@ -1,2 +1,4 @@
+background_color_class = "bg-red"
+
 [params]
 background_color_class = "bg-blue"