App.xaml

<Application
    x:Class="PostClient.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:PostClient"
    xmlns:uc="using:PostClient.Views.Controls">
    <Application.Resources>
        <Style TargetType="Button">
            <Setter Property="Margin" Value="5,10,0,5"/>
            <Setter Property="HorizontalAlignment" Value="Center"/>
            <Setter Property="Width" Value="150"/>
            <Setter Property="Height" Value="40"/>
            <Setter Property="FontSize" Value="10"/>
            <Setter Property="Background" Value="#ffafcc"/>
            <Setter Property="Foreground" Value="Black"/>
            <Setter Property="CornerRadius" Value="15"/>
        </Style>
        <Style TargetType="TextBlock">
            <Setter Property="Foreground" Value="Black"/>
        </Style>
        <Style TargetType="ListView">
            <Setter Property="Background" Value="#bde0fe"/>
        </Style>
        <Style TargetType="uc:MailMessageControl">
            <Setter Property="Foreground" Value="Black"/>
        </Style>
        <Style TargetType="AppBarButton">
            <Setter Property="Foreground" Value="Black"/>
        </Style>
    </Application.Resources>
</Application>