vba10/App.xaml

<Application
    x:Class="VBA10.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:VBA10">

    <Application.Resources>
        <ResourceDictionary>

            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Styles.xaml"/>
                <ResourceDictionary Source="StandardStyles.xaml"/>
            </ResourceDictionary.MergedDictionaries>

            <ResourceDictionary.ThemeDictionaries>
                <ResourceDictionary x:Key="Default">
                    <SolidColorBrush x:Key="TitleBarBackgroundThemeBrush" Color="#FF171717" />
                    <SolidColorBrush x:Key="TitleBarButtonHoverThemeBrush" Color="#FF343434" />
                    <SolidColorBrush x:Key="TitleBarButtonPressedThemeBrush" Color="#FF4C4C4C" />
                    <Color x:Key="TitleBarForegroundColor">#FFFFFF</Color>
                    <Color x:Key="TitleBarInactiveForegroundColor">#A0A0A0</Color>
                </ResourceDictionary>
                
               
                <ResourceDictionary x:Key="Light">
                    <SolidColorBrush x:Key="TitleBarBackgroundThemeBrush" Color="#FFF2F2F2" />
                    <SolidColorBrush x:Key="TitleBarButtonHoverThemeBrush" Color="#FFCECECE" />
                    <SolidColorBrush x:Key="TitleBarButtonPressedThemeBrush" Color="#FFB8B8B8" />
                    <Color x:Key="TitleBarForegroundColor">#000000</Color>
                    <Color x:Key="TitleBarInactiveForegroundColor">#909090</Color>
                </ResourceDictionary>
                
            </ResourceDictionary.ThemeDictionaries>
        </ResourceDictionary>
    </Application.Resources>
    
</Application>