
The following section shows the default colors. We can insert them in the Application.Resources section of App.xaml and change their values in order to obtain the style that is more appropriate to our app. Source:: Mixing themes in XAML Metro apps. Copy all SolidColorBrush object definitions associated with buttonsa and finally paste all the brushes into your resource dictionary, and you can use it.

and search for 'Dark' ResourceDictionary declaration. In particular, there are a lot of SolidColorBrush that determine the appearance of the various parts of the control. First, open: C:\Program Files (x86)\Windows Kits\8.0\Include\winrt\xaml\design\themeresources.xaml. If we want to customize the control appearance, we need to override the default colors that are defined in the generic.xaml file located in the folder C:\Program Files (x86)\Windows Kits\8.1\Include\winrt\xaml\design.

The SearchBox control that comes with Windows 8.1 makes it very easy to integrate the new search experience in our apps.
