diff --git a/src/Controls/tests/DeviceTests/Elements/Shell/ShellTests.Windows.cs b/src/Controls/tests/DeviceTests/Elements/Shell/ShellTests.Windows.cs
index bc7081c60994..800d6d1af9de 100644
--- a/src/Controls/tests/DeviceTests/Elements/Shell/ShellTests.Windows.cs
+++ b/src/Controls/tests/DeviceTests/Elements/Shell/ShellTests.Windows.cs
@@ -6,6 +6,7 @@
 using Microsoft.Maui.Controls;
 using Microsoft.Maui.Controls.Handlers;
 using Microsoft.Maui.Controls.Platform;
+using Microsoft.Maui.Graphics;
 using Microsoft.Maui.Platform;
 using Microsoft.UI.Xaml;
 using Xunit;
@@ -23,6 +24,53 @@ protected Task CheckFlyoutState(ShellHandler handler, bool desiredState)
 			return Task.CompletedTask;
 		}
 
+		[Theory(DisplayName = "Shell FlyoutBackground Initializes Correctly")]
+		[InlineData("#FF0000")]
+		[InlineData("#00FF00")]
+		[InlineData("#0000FF")]
+		[InlineData("#000000")]
+		public async Task ShellFlyoutBackgroundInitializesCorrectly(string colorHex)
+		{
+			SetupBuilder();
+
+			var expectedColor = Color.FromArgb(colorHex);
+
+			var shell = await CreateShellAsync((shell) =>
+			{
+				shell.FlyoutBehavior = FlyoutBehavior.Locked;
+				shell.FlyoutBackground = new SolidColorBrush(expectedColor);
+
+				var shellItem = new FlyoutItem();
+				shellItem.Items.Add(new ContentPage());
+				shell.Items.Add(shellItem);
+			});
+
+			await InvokeOnMainThreadAsync(async () =>
+			{
+				await CreateHandlerAndAddToWindow<ShellHandler>(shell, (handler)  =>
+				{
+					var rootNavView = handler.PlatformView;
+					var shellItemView = shell.CurrentItem.Handler.PlatformView as MauiNavigationView;
+					var expectedRoot = UI.Xaml.Controls.NavigationViewPaneDisplayMode.Left;
+					var expectedShellItems = UI.Xaml.Controls.NavigationViewPaneDisplayMode.LeftMinimal;
+
+					Assert.Equal(expectedRoot, rootNavView.PaneDisplayMode);
+					Assert.NotNull(shellItemView);
+					Assert.Equal(expectedShellItems, shellItemView.PaneDisplayMode);
+
+					return Task.CompletedTask;
+				});
+
+				await AssertionExtensions.Wait(() =>
+				{
+					var platformView = shell.Handler.PlatformView as FrameworkElement;
+					return platformView is not null && (platformView.Height > 0 || platformView.Width > 0);
+				});
+			});
+
+			await ValidateHasColor(shell, expectedColor, typeof(ShellHandler));
+		}
+
 		[Fact(DisplayName = "Back Button Enabled/Disabled")]
 		public async Task BackButtonEnabledAndDisabled()
 		{
@@ -631,4 +679,4 @@ async Task TapToSelect(ContentPage page)
 			await OnNavigatedToAsync(page);
 		}
 	}
-}
\ No newline at end of file
+}
diff --git a/src/Core/src/Platform/Windows/NavigationViewExtensions.cs b/src/Core/src/Platform/Windows/NavigationViewExtensions.cs
index f45f3f3f42e7..4645f8226749 100644
--- a/src/Core/src/Platform/Windows/NavigationViewExtensions.cs
+++ b/src/Core/src/Platform/Windows/NavigationViewExtensions.cs
@@ -42,6 +42,8 @@ public static void UpdateTopNavigationViewItemTextColor(this MauiNavigationView
 					navigationView.TopNavArea.Resources["TopNavigationViewItemForegroundPressed"] = brush;
 					navigationView.TopNavArea.Resources["TopNavigationViewItemForegroundDisabled"] = brush;
 				}
+
+				navigationView.TopNavArea.RefreshThemeResources();
 			}
 
 			if (navigationView.MenuItemsSource is IList<NavigationViewItemViewModel> items)
@@ -70,6 +72,8 @@ public static void UpdateTopNavigationViewItemBackgroundUnselectedColor(this Mau
 					navigationView.TopNavArea.Resources["TopNavigationViewItemBackgroundPointerOver"] = brush;
 					navigationView.TopNavArea.Resources["TopNavigationViewItemBackgroundPressed"] = brush;
 				}
+
+				navigationView.TopNavArea.RefreshThemeResources();
 			}
 
 			if (navigationView.MenuItemsSource is IList<NavigationViewItemViewModel> items)
@@ -98,6 +102,8 @@ public static void UpdateTopNavigationViewItemBackgroundSelectedColor(this MauiN
 					navigationView.TopNavArea.Resources["TopNavigationViewItemBackgroundSelectedPointerOver"] = brush;
 					navigationView.TopNavArea.Resources["TopNavigationViewItemBackgroundSelectedPressed"] = brush;
 				}
+
+				navigationView.TopNavArea.RefreshThemeResources();
 			}
 
 			if (navigationView.MenuItemsSource is IList<NavigationViewItemViewModel> items)
@@ -111,32 +117,28 @@ public static void UpdateTopNavigationViewItemBackgroundSelectedColor(this MauiN
 
 		public static void UpdatePaneBackground(this MauiNavigationView navigationView, Paint? paint)
 		{
-			var rootSplitView = navigationView.RootSplitView;
+			var paneContentGrid = navigationView.PaneContentGrid;
+
+			if (paneContentGrid is null)
+				return;
+
 			var brush = paint?.ToPlatform();
 
-			if (brush == null)
+			if (brush is null)
 			{
-				object? color = null;
+				object? color;
 				if (navigationView.IsPaneOpen)
 					color = navigationView.Resources["NavigationViewExpandedPaneBackground"];
 				else
 					color = navigationView.Resources["NavigationViewDefaultPaneBackground"];
 
-				if (rootSplitView != null)
-				{
-					if (color is WBrush colorBrush)
-						rootSplitView.PaneBackground = colorBrush;
-					else if (color is global::Windows.UI.Color uiColor)
-						rootSplitView.PaneBackground = new WSolidColorBrush(uiColor);
-				}
+				if (color is WBrush colorBrush)
+					paneContentGrid.Background = colorBrush;
+				else if (color is global::Windows.UI.Color uiColor)
+					paneContentGrid.Background = new WSolidColorBrush(uiColor);
 			}
 			else
-			{
-				if (rootSplitView != null)
-				{
-					rootSplitView.PaneBackground = brush;
-				}
-			}
+				paneContentGrid.Background = brush;
 		}
 
 		public static void UpdateFlyoutVerticalScrollMode(this MauiNavigationView navigationView, ScrollMode scrollMode)