diff --git a/mobile/lib/ui/viewer/file/detail_page.dart b/mobile/lib/ui/viewer/file/detail_page.dart
index 779243c27..b589d6b62 100644
--- a/mobile/lib/ui/viewer/file/detail_page.dart
+++ b/mobile/lib/ui/viewer/file/detail_page.dart
@@ -140,6 +140,7 @@ class _DetailPageState extends State<DetailPage> {
       ),
       extendBodyBehindAppBar: true,
       resizeToAvoidBottomInset: false,
+      backgroundColor: Colors.black,
       body: Center(
         child: Stack(
           children: [