Setting or modifying ThemeResource in code

Question

My questions is very specific to ThemeResources in a Windows 10 Store App. Unfortunately several things available in \"classic\" WPF are different or not available here.

Answer 1

I'm using this to set newAccentColor, until I can find a way to do it without toggling the theme. This updates all the derived brushes based on accent color:

Application.Current.Resources["SystemAccentColor"] = newAccentColor;
if (Window.Current.Content is FrameworkElement fe)
{
      var requestedTheme = fe.RequestedTheme;
      fe.RequestedTheme = fe.RequestedTheme == ElementTheme.Light ? ElementTheme.Dark : ElementTheme.Light;
      fe.RequestedTheme = requestedTheme;
}