diff --git a/samples/ControlCatalog/App.xaml b/samples/ControlCatalog/App.xaml
index 20ca291910..c7a75f5a70 100644
--- a/samples/ControlCatalog/App.xaml
+++ b/samples/ControlCatalog/App.xaml
@@ -1,10 +1,8 @@
 <Application xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              x:Class="ControlCatalog.App">
-  <Application.Styles>
-    <StyleInclude Source="avares://Avalonia.Themes.Default/DefaultTheme.xaml"/>
-    <StyleInclude Source="avares://Avalonia.Themes.Default/Accents/BaseLight.xaml"/>
-    <StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Default.xaml"/>    
+  <Application.Styles>        
+    <StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Default.xaml"/>
     <Style Selector="TextBlock.h1">
       <Setter Property="FontSize" Value="{DynamicResource FontSizeLarge}"/>
       <Setter Property="FontWeight" Value="Medium"/>
diff --git a/samples/ControlCatalog/App.xaml.cs b/samples/ControlCatalog/App.xaml.cs
index 52a9591c94..a6754143a2 100644
--- a/samples/ControlCatalog/App.xaml.cs
+++ b/samples/ControlCatalog/App.xaml.cs
@@ -1,14 +1,67 @@
+using System;
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Markup.Xaml;
+using Avalonia.Markup.Xaml.Styling;
+using Avalonia.Styling;
 
 namespace ControlCatalog
 {
     public class App : Application
     {
+        public static Styles FluentDark = new Styles
+        {
+            new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
+            {
+                Source = new Uri("resm:Avalonia.Themes.Default.Accents.BaseDark.xaml?assembly=Avalonia.Themes.Default")
+            },
+            new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
+            {
+                Source = new Uri("resm:Avalonia.Themes.Fluent.Accents.FluentDark.xaml?assembly=Avalonia.Themes.Fluent")
+            },
+        };
+
+        public static Styles FluentLight = new Styles
+        {
+            new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
+            {
+                Source = new Uri("resm:Avalonia.Themes.Default.Accents.BaseLight.xaml?assembly=Avalonia.Themes.Default")
+            },
+            new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
+            {
+                Source = new Uri("resm:Avalonia.Themes.Fluent.Accents.FluentLight.xaml?assembly=Avalonia.Themes.Fluent")
+            },
+        };
+
+        public static Styles DefaultLight = new Styles
+        {
+            new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
+            {
+                Source = new Uri("resm:Avalonia.Themes.Default.Accents.BaseLight.xaml?assembly=Avalonia.Themes.Default")
+            },
+            new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
+            {
+                Source = new Uri("resm:Avalonia.Themes.Default.DefaultTheme.xaml?assembly=Avalonia.Themes.Default")
+            },
+        };
+
+        public static Styles DefaultDark = new Styles
+        {
+            new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
+            {
+                Source = new Uri("resm:Avalonia.Themes.Default.Accents.BaseDark.xaml?assembly=Avalonia.Themes.Default")
+            },
+            new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
+            {
+                Source = new Uri("resm:Avalonia.Themes.Default.DefaultTheme.xaml?assembly=Avalonia.Themes.Default")
+            },
+        };
+
         public override void Initialize()
         {
             AvaloniaXamlLoader.Load(this);
+
+            Styles.Insert(0, FluentDark);
         }
 
         public override void OnFrameworkInitializationCompleted()
diff --git a/samples/ControlCatalog/MainView.xaml b/samples/ControlCatalog/MainView.xaml
index add5dbde84..7956ee6169 100644
--- a/samples/ControlCatalog/MainView.xaml
+++ b/samples/ControlCatalog/MainView.xaml
@@ -67,8 +67,10 @@
             <ComboBoxItem>Full Decorations</ComboBoxItem>
           </ComboBox>
           <ComboBox x:Name="Themes" SelectedIndex="0">
-            <ComboBoxItem>Light</ComboBoxItem>
-            <ComboBoxItem>Dark</ComboBoxItem>
+            <ComboBoxItem>Fluent - Dark</ComboBoxItem>
+            <ComboBoxItem>Fluent - Light</ComboBoxItem>
+            <ComboBoxItem>Simple - Light</ComboBoxItem>
+            <ComboBoxItem>Simple - Dark</ComboBoxItem>
           </ComboBox>
           <ComboBox x:Name="TransparencyLevels" SelectedIndex="0">
             <ComboBoxItem>None</ComboBoxItem>
diff --git a/samples/ControlCatalog/MainView.xaml.cs b/samples/ControlCatalog/MainView.xaml.cs
index 2d01d37dbe..d6d4a71ad3 100644
--- a/samples/ControlCatalog/MainView.xaml.cs
+++ b/samples/ControlCatalog/MainView.xaml.cs
@@ -32,30 +32,25 @@ namespace ControlCatalog
 
             }
 
-            var light = new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
-            {
-                Source = new Uri("resm:Avalonia.Themes.Default.Accents.BaseLight.xaml?assembly=Avalonia.Themes.Default")
-            };
-            var dark = new StyleInclude(new Uri("resm:Styles?assembly=ControlCatalog"))
-            {
-                Source = new Uri("resm:Avalonia.Themes.Default.Accents.BaseDark.xaml?assembly=Avalonia.Themes.Default")
-            };
-
-
             var themes = this.Find<ComboBox>("Themes");
             themes.SelectionChanged += (sender, e) =>
             {
                 switch (themes.SelectedIndex)
                 {
                     case 0:
-                        Styles[0] = light;
+                        Application.Current.Styles[0] = App.FluentDark;
                         break;
                     case 1:
-                        Styles[0] = dark;
+                        Application.Current.Styles[0] = App.FluentLight;
+                        break;
+                    case 2:
+                        Application.Current.Styles[0] = App.DefaultLight;
+                        break;
+                    case 3:
+                        Application.Current.Styles[0] = App.DefaultDark;
                         break;
                 }
-            };
-            Styles.Add(light);
+            };            
 
             var decorations = this.Find<ComboBox>("Decorations");
             decorations.SelectionChanged += (sender, e) =>
diff --git a/samples/ControlCatalog/MainWindow.xaml b/samples/ControlCatalog/MainWindow.xaml
index a0bb956425..76422bc130 100644
--- a/samples/ControlCatalog/MainWindow.xaml
+++ b/samples/ControlCatalog/MainWindow.xaml
@@ -7,7 +7,7 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:vm="clr-namespace:ControlCatalog.ViewModels"
         xmlns:v="clr-namespace:ControlCatalog.Views"
-        x:Class="ControlCatalog.MainWindow" WindowState="{Binding WindowState, Mode=TwoWay}" Background="Transparent">
+        x:Class="ControlCatalog.MainWindow" WindowState="{Binding WindowState, Mode=TwoWay}" Background="{DynamicResource SystemControlPageBackgroundAltHighBrush}">
   <NativeMenu.Menu>
     <NativeMenu>
       <NativeMenuItem Header="File">
diff --git a/src/Avalonia.Themes.Fluent/Accents/FluentDark.xaml b/src/Avalonia.Themes.Fluent/Accents/FluentDark.xaml
index 5b6da70233..d29db79e7b 100644
--- a/src/Avalonia.Themes.Fluent/Accents/FluentDark.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/FluentDark.xaml
@@ -5,4 +5,5 @@
   <StyleInclude Source="resm:Avalonia.Themes.Fluent.Accents.Base.xaml?assembly=Avalonia.Themes.Fluent" />
   <StyleInclude Source="resm:Avalonia.Themes.Fluent.Accents.FluentBaseDark.xaml?assembly=Avalonia.Themes.Fluent" />
   <StyleInclude Source="resm:Avalonia.Themes.Fluent.Accents.FluentControlResourcesDark.xaml?assembly=Avalonia.Themes.Fluent" />
+  <StyleInclude Source="resm:Avalonia.Themes.Fluent.FluentTheme.xaml?assembly=Avalonia.Themes.Fluent" />
 </Styles>
diff --git a/src/Avalonia.Themes.Fluent/Accents/FluentLight.xaml b/src/Avalonia.Themes.Fluent/Accents/FluentLight.xaml
index 5825a2bf34..43867f6e97 100644
--- a/src/Avalonia.Themes.Fluent/Accents/FluentLight.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/FluentLight.xaml
@@ -5,4 +5,5 @@
   <StyleInclude Source="resm:Avalonia.Themes.Fluent.Accents.Base.xaml?assembly=Avalonia.Themes.Fluent" />  
   <StyleInclude Source="resm:Avalonia.Themes.Fluent.Accents.FluentBaseLight.xaml?assembly=Avalonia.Themes.Fluent" />
   <StyleInclude Source="resm:Avalonia.Themes.Fluent.Accents.FluentControlResourcesLight.xaml?assembly=Avalonia.Themes.Fluent" />
+  <StyleInclude Source="resm:Avalonia.Themes.Fluent.FluentTheme.xaml?assembly=Avalonia.Themes.Fluent" />
 </Styles>