diff --git a/packages/ui/css/styles.css b/packages/ui/css/styles.css
index d93ba87829..61051fdf07 100644
--- a/packages/ui/css/styles.css
+++ b/packages/ui/css/styles.css
@@ -9098,6 +9098,10 @@
   }
 }
 
+body {
+  background-color: var(--bui-bg);
+}
+
 :root {
   --bui-font-regular: system-ui;
   --bui-font-monospace: ui-monospace, "Menlo", "Monaco", "Consolas", "Liberation Mono", "Courier New", monospace;
diff --git a/packages/ui/src/css/core.css b/packages/ui/src/css/core.css
index 088d4d6f2b..a8ab7cfc6b 100644
--- a/packages/ui/src/css/core.css
+++ b/packages/ui/src/css/core.css
@@ -30,6 +30,10 @@
   }
 }
 
+body {
+  background-color: var(--bui-bg);
+}
+
 /* Light theme tokens */
 :root {
   /* Font families */