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### Preflight Checklist
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* [x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
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### Problem Description
I need a way of checking if the user is in https://i.imgur.com/yvZYfsG.png
Windows Dark mode or light mode

### Proposed Solution
systemPreferences.getShellColorType()

### Alternatives Considered
n/a

### Additional Information
Because my app icon is white, I want it to invert if using the Windows 10 light mode.
https://i.imgur.com/dzsLQTs.png
You can barely see it in light mode.

shell/browser/api/atom_api_system_preferences.cc
#if defined(OS_WIN)
  Browser::Get()->RemoveObserver(this);
#endif
}
#if !defined(OS_MACOSX)
bool SystemPreferences::IsDarkMode() {
  return false;
}
#endif
bool SystemPreferences::IsInvertedColorScheme() {
  return color_utils::IsInvertedColorScheme();
}
#if !defined(OS_WIN)
bool SystemPreferences::IsHighContrastColorScheme() {
  return false;
}
#endif  
v8::Local<v8::Value> SystemPreferences::GetAnimationSettings(
    v8::Isolate* isolate) {
  mate::Dictionary dict = mate::Dictionary::CreateEmpty(isolate);
  dict.SetHidden("simple", true);
  dict.Set("shouldRenderRichAnimation",
           gfx::Animation::ShouldRenderRichAnimation());
  dict.Set("scrollAnimationsEnabledBySystem",
           gfx::Animation::ScrollAnimationsEnabledBySystem());
  dict.Set("prefersReducedMotion", gfx::Animation::PrefersReducedMotion());
  return dict.GetHandle();
}
mate::Handle<SystemPreferences> SystemPreferences::Create(