diff --git a/RevitLookup.UI/Win32/Utilities.cs b/RevitLookup.UI/Win32/Utilities.cs
index db934637b..274b93067 100644
--- a/RevitLookup.UI/Win32/Utilities.cs
+++ b/RevitLookup.UI/Win32/Utilities.cs
@@ -16,7 +16,7 @@ namespace Wpf.Ui.Win32;
 /// </summary>
 // ReSharper disable InconsistentNaming
 // ReSharper disable ConditionIsAlwaysTrueOrFalseAccordingToNullableAPIContract
-internal class Utilities
+public class Utilities
 {
     private static readonly PlatformID _osPlatform = Environment.OSVersion.Platform;
 
diff --git a/RevitLookup/Core/ComponentModel/Descriptors/ColorDescriptor.cs b/RevitLookup/Core/ComponentModel/Descriptors/ColorDescriptor.cs
index 3e58ce765..183019e14 100644
--- a/RevitLookup/Core/ComponentModel/Descriptors/ColorDescriptor.cs
+++ b/RevitLookup/Core/ComponentModel/Descriptors/ColorDescriptor.cs
@@ -18,15 +18,28 @@
 // Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
 // (Rights in Technical Data and Computer Software), as applicable.
 
-using Autodesk.Revit.DB;
+using RevitLookup.Core.Contracts;
 using RevitLookup.Core.Objects;
+using Color = Autodesk.Revit.DB.Color;
 
 namespace RevitLookup.Core.ComponentModel.Descriptors;
 
-public sealed class ColorDescriptor : Descriptor
+public sealed class ColorDescriptor : Descriptor, IDescriptorExtension
 {
+    private readonly Color _color;
+
     public ColorDescriptor(Color color)
     {
+        _color = color;
         Name = color.IsValid ? $"RGB: {color.Red} {color.Green} {color.Blue}" : "The color represents uninitialized/invalid value";
     }
+
+    public void RegisterExtensions(IExtensionManager manager)
+    {
+        manager.Register(_color, extension =>
+        {
+            extension.Name = "HEX";
+            extension.Result = $"#{extension.Value.Red:X2}{extension.Value.Green:X2}{extension.Value.Blue:X2}";
+        });
+    }
 }
\ No newline at end of file
diff --git a/RevitLookup/ViewModels/Pages/SettingsViewModel.cs b/RevitLookup/ViewModels/Pages/SettingsViewModel.cs
index ca24518e3..431cd692d 100644
--- a/RevitLookup/ViewModels/Pages/SettingsViewModel.cs
+++ b/RevitLookup/ViewModels/Pages/SettingsViewModel.cs
@@ -19,14 +19,21 @@
 // (Rights in Technical Data and Computer Software), as applicable.
 
 using CommunityToolkit.Mvvm.ComponentModel;
+using RevitLookup.Services;
 using RevitLookup.Services.Contracts;
 using Wpf.Ui;
 using Wpf.Ui.Appearance;
 using Wpf.Ui.Controls;
+using static Wpf.Ui.Win32.Utilities;
 
 namespace RevitLookup.ViewModels.Pages;
 
-public sealed partial class SettingsViewModel(ISettingsService settingsService, INavigationService navigationService, IWindow window) : ObservableObject
+public sealed partial class SettingsViewModel(
+    ISettingsService settingsService,
+    INavigationService navigationService,
+    NotificationService notificationService,
+    IWindow window)
+    : ObservableObject
 {
     [ObservableProperty] private ApplicationTheme _theme = settingsService.Theme;
     [ObservableProperty] private WindowBackdropType _background = settingsService.Background;
@@ -54,7 +61,13 @@ public sealed partial class SettingsViewModel(ISettingsService settingsService,
     partial void OnThemeChanged(ApplicationTheme value)
     {
         settingsService.Theme = value;
-        ApplicationThemeManager.Apply(settingsService.Theme, settingsService.Background);
+        if (IsOSWindows11OrNewer)
+        {
+            ApplicationThemeManager.Apply(settingsService.Theme, settingsService.Background);
+            return;
+        }
+
+        notificationService.ShowSuccess("Theme changed", "Changes will take effect for new windows");
     }
 
     partial void OnBackgroundChanged(WindowBackdropType value)