electron
diff --git a/‎shell/browser/win/dark_mode.cc‎
Lines changed: 8 additions & 4 deletions b/‎shell/browser/win/dark_mode.cc‎
Lines changed: 8 additions & 4 deletions
@@ -16,11 +16,12 @@
 namespace {
 
 // Use private Windows API to set window theme.
-HRESULT TrySetWindowTheme(HWND hWnd, bool dark) {
+BOOL CALLBACK TrySetWindowTheme(HWND hWnd, LPARAM lparam) {
+  bool dark = static_cast<bool>(lparam);
   HRESULT result =
       SetWindowTheme(hWnd, dark ? DARK_MODE_STRING_NAME : L"", nullptr);
   if (FAILED(result))
-    return result;
+    return FALSE;
 
   const BOOL isDarkMode = dark;
   if (FAILED(DwmSetWindowAttribute(hWnd, DWMWA_USE_IMMERSIVE_DARK_MODE,
@@ -29,7 +30,7 @@ HRESULT TrySetWindowTheme(HWND hWnd, bool dark) {
         DwmSetWindowAttribute(hWnd, DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1,
                               &isDarkMode, sizeof(isDarkMode));
     if (FAILED(result))
-      return result;
+      return FALSE;
   }
 
   // Toggle the nonclient area active state to force a redraw
@@ -50,7 +51,10 @@ void SetDarkModeForWindow(HWND hWnd) {
   ui::NativeTheme* theme = ui::NativeTheme::GetInstanceForNativeUi();
   bool dark =
       theme->ShouldUseDarkColors() && !theme->UserHasContrastPreference();
-  TrySetWindowTheme(hWnd, dark);
+
+  // Set theme for all windows (e.g. DevTools)
+  EnumThreadWindows(GetCurrentThreadId(), TrySetWindowTheme,
+                    static_cast<LPARAM>(dark));
 }
 
 }  // namespace win