diff --git a/lib/tray.ts b/lib/tray.ts
index b755a1d..969d8b4 100644
--- a/lib/tray.ts
+++ b/lib/tray.ts
@@ -1,4 +1,5 @@
 import * as Sentry from '@sentry/browser'
+import { invoke } from '@tauri-apps/api/core'
 import { Menu } from '@tauri-apps/api/menu'
 import { MenuItem } from '@tauri-apps/api/menu'
 import { resolveResource } from '@tauri-apps/api/path'
@@ -22,6 +23,21 @@ async function getTray() {
     return await TrayIcon.getById('main-tray')
 }
 
+async function resolveTrayIconForTheme() {
+    let theme: 'light' | 'dark' = 'dark'
+    try {
+        const t = (await invoke<string>('get_system_theme')) || 'dark'
+        theme = t === 'dark' ? 'dark' : 'light'
+    } catch {}
+
+    console.log('[resolveTrayIconForTheme] theme', theme)
+
+    const pickedPath = theme === 'dark' ? 'icons/favicon/icon.png' : 'icons/favicon/icon-light.png'
+    console.log('[resolveTrayIconForTheme] pickedPath', pickedPath)
+
+    return await resolveResource(pickedPath)
+}
+
 export async function showLoadingTray() {
     console.log('[showLoadingTray]')
 
@@ -88,7 +104,9 @@ export async function showDefaultTray() {
 
     const newMenu = await buildMenu()
     await tray.setMenu(newMenu)
-    await tray.setIcon(await resolveResource('icons/favicon/icon.png'))
+
+    const iconPath = await resolveTrayIconForTheme()
+    await tray.setIcon(iconPath)
     await tray.setTooltip('Rclone')
 
     console.log('[showDefaultTray] tray menu rebuilt')
@@ -98,9 +116,10 @@ export async function initTray() {
     try {
         console.log('[initTray]')
 
+        const initialIcon = await resolveTrayIconForTheme()
         await TrayIcon.new({
             id: 'main-tray',
-            icon: (await resolveResource('icons/favicon/icon.png'))!,
+            icon: initialIcon!,
             tooltip: 'Rclone',
             menuOnLeftClick: true,
             action: async (event: TrayIconEvent) => {
diff --git a/src-tauri/icons/favicon/icon-light.png b/src-tauri/icons/favicon/icon-light.png
new file mode 100644
index 0000000..ad31977
Binary files /dev/null and b/src-tauri/icons/favicon/icon-light.png differ
diff --git a/src-tauri/icons/favicon/icon.png b/src-tauri/icons/favicon/icon.png
index d93c321..5bed538 100644
Binary files a/src-tauri/icons/favicon/icon.png and b/src-tauri/icons/favicon/icon.png differ
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index a344e30..0c8c703 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -248,6 +248,98 @@ fn get_uid() -> String {
     return machine_uid::get().unwrap();
 }
 
+#[tauri::command]
+fn get_system_theme() -> String {
+    #[cfg(target_os = "macos")]
+    {
+        use std::process::Command;
+        if let Ok(output) = Command::new("defaults")
+            .args(&["read", "-g", "AppleInterfaceStyle"])
+            .output()
+        {
+            if output.status.success() {
+                let out = String::from_utf8_lossy(&output.stdout).to_ascii_lowercase();
+                if out.contains("dark") {
+                    return "dark".to_string();
+                }
+            }
+        }
+        return "light".to_string();
+    }
+
+    #[cfg(target_os = "windows")]
+    {
+        use std::process::Command;
+        if let Ok(output) = Command::new("reg").args(&[
+            "query",
+            r"HKCU\\Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
+            "/v",
+            "AppsUseLightTheme",
+        ]).output() {
+            if output.status.success() {
+                let out = String::from_utf8_lossy(&output.stdout).to_ascii_lowercase();
+                if out.contains("0x0") || out.contains("0x00000000") {
+                    return "dark".to_string();
+                }
+                if out.contains("0x1") || out.contains("0x00000001") {
+                    return "light".to_string();
+                }
+            }
+        }
+        return "light".to_string();
+    }
+
+    #[cfg(target_os = "linux")]
+    {
+        use std::process::Command;
+
+        // GNOME color-scheme (prefer-dark)
+        if let Ok(output) = Command::new("gsettings")
+            .args(&["get", "org.gnome.desktop.interface", "color-scheme"])
+            .output()
+        {
+            if output.status.success() {
+                let out = String::from_utf8_lossy(&output.stdout).to_ascii_lowercase();
+                if out.contains("dark") {
+                    return "dark".to_string();
+                }
+            }
+        }
+
+        // GNOME gtk-theme name contains "dark"
+        if let Ok(output) = Command::new("gsettings")
+            .args(&["get", "org.gnome.desktop.interface", "gtk-theme"])
+            .output()
+        {
+            if output.status.success() {
+                let out = String::from_utf8_lossy(&output.stdout).to_ascii_lowercase();
+                if out.contains("dark") {
+                    return "dark".to_string();
+                }
+            }
+        }
+
+        // KDE color scheme via kreadconfig5
+        if let Ok(output) = Command::new("kreadconfig5")
+            .args(&["--group", "General", "--key", "ColorScheme"])
+            .output()
+        {
+            if output.status.success() {
+                let out = String::from_utf8_lossy(&output.stdout).to_ascii_lowercase();
+                if out.contains("dark") {
+                    return "dark".to_string();
+                }
+            }
+        }
+
+        return "light".to_string();
+    }
+
+    #[cfg(not(any(target_os = "macos", target_os = "windows", target_os = "linux")))]
+    {
+        "dark".to_string()
+    }
+}
 #[tauri::command]
 fn is_rclone_running(port: Option<u16>) -> bool {
 
@@ -710,7 +802,7 @@ pub fn run() {
 		.plugin(tauri_plugin_shell::init())
 		.plugin(tauri_plugin_opener::init())
 		.plugin(tauri_plugin_prevent_default::debug())
-		.invoke_handler(tauri::generate_handler![unzip_file, get_arch, get_uid, is_rclone_running, stop_rclone_processes, prompt_password, prompt_text, stop_pid, update_system_rclone, test_proxy_connection, is_tray_supported])
+		.invoke_handler(tauri::generate_handler![unzip_file, get_arch, get_uid, is_rclone_running, stop_rclone_processes, prompt_password, prompt_text, stop_pid, update_system_rclone, test_proxy_connection, is_tray_supported, get_system_theme])
         .setup(|_app| Ok(()))
         // .setup(|app| {
         //     if cfg!(debug_assertions) {