Changing a single theme color in Windows Store 8.1 app

Question

I am aware that there are only 3 standard themes available on Windows Store 8.1 app. I'm OK with that. But I would like to change a single color or brush from the selected theme (for example I want to change ButtonBackgroundThemeBrush in the Light theme to solid Red) for my application. Anyone know how to achieve that?

I found these questions on SO:

Make own windows 8 app theme

How do I mix Light and Dark themes in a C#/XAML Windows Store (Metro UI) App?

Create a theme in Windows 8.1

but I could not find any clear answer.

Answer 1

Ok, I found the way, just insert into App.xaml the following code:

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.ThemeDictionaries>
            <ResourceDictionary x:Key="Light">
                <SolidColorBrush x:Key="ButtonBackgroundThemeBrush" Color="Red" />
            </ResourceDictionary>
        </ResourceDictionary.ThemeDictionaries>
    </ResourceDictionary>
</Application.Resources>