diff --git a/core/ui/src/commonMain/kotlin/io/github/droidkaigi/confsched/ui/component/AnimatedTextTopAppBar.kt b/core/ui/src/commonMain/kotlin/io/github/droidkaigi/confsched/ui/component/AnimatedTextTopAppBar.kt
index 41485153f..9e7ae44af 100644
--- a/core/ui/src/commonMain/kotlin/io/github/droidkaigi/confsched/ui/component/AnimatedTextTopAppBar.kt
+++ b/core/ui/src/commonMain/kotlin/io/github/droidkaigi/confsched/ui/component/AnimatedTextTopAppBar.kt
@@ -26,7 +26,9 @@ fun AnimatedTextTopAppBar(
     navigationIcon: @Composable () -> Unit = {},
     actions: @Composable RowScope.() -> Unit = {},
     windowInsets: WindowInsets = TopAppBarDefaults.windowInsets,
-    colors: TopAppBarColors = TopAppBarDefaults.topAppBarColors(),
+    colors: TopAppBarColors = TopAppBarDefaults.topAppBarColors().copy(
+        scrolledContainerColor = MaterialTheme.colorScheme.surfaceContainer,
+    ),
     textColor: Color = MaterialTheme.colorScheme.onSurface,
     scrollBehavior: TopAppBarScrollBehavior? = null,
 ) {