diff --git a/HandyControl/Controls/Window/BlurWindow.cs b/HandyControl/Controls/Window/BlurWindow.cs
index 44582434..accf561d 100644
--- a/HandyControl/Controls/Window/BlurWindow.cs
+++ b/HandyControl/Controls/Window/BlurWindow.cs
@@ -1,5 +1,6 @@
 using System.Runtime.InteropServices;
 using System.Windows.Interop;
+using System.Windows.Media;
 using HandyControl.Data;
 using HandyControl.Tools;
 
@@ -30,6 +31,10 @@ namespace HandyControl.Controls
             }
             else
             {
+                var colorValue = ResourceHelper.GetResource<uint>(ResourceToken.BlurGradientValue);
+                var color = ColorHelper.ToColor(colorValue);
+                color = Color.FromRgb(color.R, color.G, color.B);
+                window.Background = new SolidColorBrush(color);
                 return;
             }
 
diff --git a/HandyControl/Tools/Helper/ColorHelper.cs b/HandyControl/Tools/Helper/ColorHelper.cs
index 6163f7bc..4a853dc8 100644
--- a/HandyControl/Tools/Helper/ColorHelper.cs
+++ b/HandyControl/Tools/Helper/ColorHelper.cs
@@ -1,4 +1,5 @@
-using System.Windows.Media;
+using System;
+using System.Windows.Media;
 
 namespace HandyControl.Tools
 {
@@ -9,5 +10,11 @@ namespace HandyControl.Tools
         private const int Win32BlueShift = 16;
 
         public static int ToWin32(Color c) => c.R << Win32RedShift | c.G << Win32GreenShift | c.B << Win32BlueShift;
+
+        public static Color ToColor(uint c)
+        {
+            var bytes = BitConverter.GetBytes(c);
+            return Color.FromArgb(bytes[3], bytes[2], bytes[1], bytes[0]);
+        }
     }
 }
\ No newline at end of file
diff --git a/HandyControlDemo/Data/AppConfig.cs b/HandyControlDemo/Data/AppConfig.cs
index 6e3412aa..1768fb96 100644
--- a/HandyControlDemo/Data/AppConfig.cs
+++ b/HandyControlDemo/Data/AppConfig.cs
@@ -7,7 +7,7 @@ namespace HandyControlDemo.Data
     {
         public static string SavePath = $"{AppDomain.CurrentDomain.BaseDirectory}AppConfig.json";
 
-        public string Lang { get; set; } = "cn";
+        public string Lang { get; set; } = "zh-cn";
 
         public SkinType Skin { get; set; }
     }
diff --git a/HandyControlDemo/UserControl/Main/LeftMainContent.xaml b/HandyControlDemo/UserControl/Main/LeftMainContent.xaml
index 0546e8db..c7abc8a1 100644
--- a/HandyControlDemo/UserControl/Main/LeftMainContent.xaml
+++ b/HandyControlDemo/UserControl/Main/LeftMainContent.xaml
@@ -4,7 +4,7 @@
         x:Class="HandyControlDemo.UserControl.LeftMainContent"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:data="clr-namespace:HandyControlDemo.Data"
-        Background="Transparent"
+        Background="{Binding Background,RelativeSource={RelativeSource FindAncestor,AncestorType=Window}}"
         xmlns:controls="clr-namespace:HandyControl.Controls;assembly=HandyControl"
         xmlns:langs="clr-namespace:HandyControlDemo.Properties.Langs"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
diff --git a/HandyControlDemo/UserControl/Main/NoUserContent.xaml b/HandyControlDemo/UserControl/Main/NoUserContent.xaml
index c4b36c88..8a4efbfd 100644
--- a/HandyControlDemo/UserControl/Main/NoUserContent.xaml
+++ b/HandyControlDemo/UserControl/Main/NoUserContent.xaml
@@ -70,7 +70,7 @@
         <Border Background="{DynamicResource SecondaryRegionBrush}" CornerRadius="4" Margin="16" Effect="{StaticResource EffectShadow2}">
             <StackPanel Orientation="Horizontal">
                 <StackPanel Button.Click="ButtonLangs_OnClick" Margin="10,10,0,10">
-                    <Button Tag="cn" Style="{StaticResource ButtonCustom}">
+                    <Button Tag="zh-cn" Style="{StaticResource ButtonCustom}">
                         <Image Width="32" Source="/HandyControlDemo;component/Resources/Img/Flag/cn.png"/>
                     </Button>
                     <Button Tag="en" Style="{StaticResource ButtonCustom}" Margin="0,10,0,0">