diff --git a/src/client/dd-hub-react/src/sections/document/view/doc-full-view.tsx b/src/client/dd-hub-react/src/sections/document/view/doc-full-view.tsx
index 79c6619..8be4d28 100644
--- a/src/client/dd-hub-react/src/sections/document/view/doc-full-view.tsx
+++ b/src/client/dd-hub-react/src/sections/document/view/doc-full-view.tsx
@@ -83,6 +83,7 @@ export default function DocFullView({ data, format, open, handleClose }: DocFull
         }
 
         // Download link for unsupported preview formats
+        style.bgcolor = 'lightgray'
         return (
             <Box textAlign="center">
                 <p>This file type cannot be displayed. You can download it below:</p>