diff --git a/lib/pages/markdown_reader/md_reader_tab_page.dart b/lib/pages/markdown_reader/md_reader_tab_page.dart
index 259e2b5..01905aa 100644
--- a/lib/pages/markdown_reader/md_reader_tab_page.dart
+++ b/lib/pages/markdown_reader/md_reader_tab_page.dart
@@ -271,7 +271,7 @@ class _MdReaderTabPageState extends State<MdReaderTabPage> {
   void _showSettingsSheet() {
     showModalBottomSheet(
       context: context,
-      backgroundColor: Colors.white,
+      backgroundColor: Theme.of(context).colorScheme.surface,
       shape: const RoundedRectangleBorder(
         borderRadius: BorderRadius.vertical(top: Radius.circular(16)),
       ),