diff --git a/shadowsocks-csharp/Util/Util.cs b/shadowsocks-csharp/Util/Util.cs
index 653f9a2b..b62bb567 100755
--- a/shadowsocks-csharp/Util/Util.cs
+++ b/shadowsocks-csharp/Util/Util.cs
@@ -55,6 +55,37 @@ namespace Shadowsocks.Util
             return _tempPath;
         }
 
+        public enum WindowsThemeMode { Dark, Light }
+
+        // Support on Windows 10 1903+
+        public static WindowsThemeMode GetWindows10SystemThemeSetting()
+        {
+            WindowsThemeMode registData = WindowsThemeMode.Dark;
+            try
+            {
+                RegistryKey reg_HKCU = Registry.CurrentUser;
+                RegistryKey reg_ThemesPersonalize = reg_HKCU.OpenSubKey(@"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize", false);
+                if (reg_ThemesPersonalize.GetValue("SystemUsesLightTheme") != null)
+                {
+                    if (Convert.ToInt32(reg_ThemesPersonalize.GetValue("SystemUsesLightTheme").ToString()) == 0) // 0:dark mode, 1:light mode
+                        registData = WindowsThemeMode.Dark;
+                    else
+                        registData = WindowsThemeMode.Light;
+                    //Console.WriteLine(registData);
+                }
+                else
+                {
+                    throw new Exception("Reg-Value SystemUsesLightTheme not found.");
+                }
+            }
+            catch
+            {
+                Logging.Info(
+                        $"Cannot get Windows 10 system theme mode, return default value 0 (dark mode).");
+            }
+            return registData;
+        }
+
         // return a full path with filename combined which pointed to the temporary directory
         public static string GetTempPath(string filename)
         {
diff --git a/shadowsocks-csharp/View/MenuViewController.cs b/shadowsocks-csharp/View/MenuViewController.cs
index 845f8319..b593fefb 100644
--- a/shadowsocks-csharp/View/MenuViewController.cs
+++ b/shadowsocks-csharp/View/MenuViewController.cs
@@ -13,6 +13,8 @@ using Shadowsocks.Model;
 using Shadowsocks.Properties;
 using Shadowsocks.Util;
 using System.Linq;
+using Microsoft.Win32;
+using System.Windows.Interop;
 
 namespace Shadowsocks.View
 {
@@ -57,6 +59,7 @@ namespace Shadowsocks.View
         private LogForm logForm;
         private HotkeySettingsForm hotkeySettingsForm;
         private string _urlToOpen;
+        private Utils.WindowsThemeMode currentWindowsThemeMode;
 
         public MenuViewController(ShadowsocksController controller)
         {
@@ -161,6 +164,14 @@ namespace Shadowsocks.View
             Configuration config = controller.GetConfigurationCopy();
             bool enabled = config.enabled;
             bool global = config.global;
+
+            // set Windows 10 Theme color (1903+)
+            currentWindowsThemeMode = Utils.GetWindows10SystemThemeSetting();
+
+            if (currentWindowsThemeMode == Utils.WindowsThemeMode.Light)
+                if (!global || !enabled)
+                    icon_baseBitmap = getDarkTrayIcon(icon_baseBitmap);
+
             icon_baseBitmap = getTrayIconByState(icon_baseBitmap, enabled, global);
 
             icon_base = Icon.FromHandle(icon_baseBitmap.GetHicon());
@@ -192,6 +203,33 @@ namespace Shadowsocks.View
             ViewUtils.SetNotifyIconText(_notifyIcon, text);
         }
 
+        private Bitmap getDarkTrayIcon(Bitmap originIcon)
+        {
+            Bitmap iconCopy = new Bitmap(originIcon);
+            for (int x = 0; x < iconCopy.Width; x++)
+            {
+                for (int y = 0; y < iconCopy.Height; y++)
+                {
+                    Color color = originIcon.GetPixel(x, y);
+                    if (color.A != 0)
+                    {
+                        Color flyBlue = Color.FromArgb(192, 0, 0, 0);
+                        // Multiply with flyBlue
+                        int red = color.R * flyBlue.R / 255;
+                        int green = color.G * flyBlue.G / 255;
+                        int blue = color.B * flyBlue.B / 255;
+                        int alpha = color.A;
+                        iconCopy.SetPixel(x, y, Color.FromArgb(alpha, red, green, blue));
+                    }
+                    else
+                    {
+                        iconCopy.SetPixel(x, y, Color.FromArgb(color.A, color.R, color.G, color.B));
+                    }
+                }
+            }
+            return iconCopy;
+        }
+
         private Bitmap getTrayIconByState(Bitmap originIcon, bool enabled, bool global)
         {
             Bitmap iconCopy = new Bitmap(originIcon);
@@ -204,12 +242,17 @@ namespace Shadowsocks.View
                     {
                         if (!enabled)
                         {
-                            Color flyBlue = Color.FromArgb(192, 192, 192);
                             // Multiply with flyBlue
+                            Color flyBlue;
+                            if (currentWindowsThemeMode == Utils.WindowsThemeMode.Light)
+                                flyBlue = Color.FromArgb(128, 192, 192, 192); // Dark icon more transparent
+                            else
+                                flyBlue = Color.FromArgb(192, 192, 192, 192); // Light icon less transparent
                             int red = color.R * flyBlue.R / 255;
                             int green = color.G * flyBlue.G / 255;
                             int blue = color.B * flyBlue.B / 255;
-                            iconCopy.SetPixel(x, y, Color.FromArgb(color.A, red, green, blue));
+                            int alpha = color.A * flyBlue.A / 255;
+                            iconCopy.SetPixel(x, y, Color.FromArgb(alpha, red, green, blue));
                         }
                         else if (global)
                         {
@@ -586,6 +629,7 @@ namespace Shadowsocks.View
 
         private void notifyIcon1_Click(object sender, MouseEventArgs e)
         {
+            UpdateTrayIcon();
             if (e.Button == MouseButtons.Middle)
             {
                 ShowLogForm();
diff --git a/shadowsocks-csharp/shadowsocks-csharp.csproj b/shadowsocks-csharp/shadowsocks-csharp.csproj
index 7e600fac..68c76381 100644
--- a/shadowsocks-csharp/shadowsocks-csharp.csproj
+++ b/shadowsocks-csharp/shadowsocks-csharp.csproj
@@ -83,6 +83,7 @@
     <Reference Include="Newtonsoft.Json, Version=12.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <HintPath>3rd\Newtonsoft.Json.12.0.1\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
+    <Reference Include="PresentationCore" />
     <Reference Include="System" />
     <Reference Include="System.Data" />
     <Reference Include="System.Drawing" />