Timer.xaml

<Window x:Class="MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:Timer2._0"
        mc:Ignorable="d" Height="109.8" Width="560" Topmost="{Binding AllwaysVisible, Mode=TwoWay, Source={x:Static local:MySettings.Default}}" WindowStartupLocation="Manual" Background="{x:Null}" WindowStyle="None" AllowsTransparency="True" Left="100" Top="100" Title="Timer">
    <Grid>
        <Grid.Background>
            <SolidColorBrush Color="{Binding BackgroundColor, Mode=TwoWay, Source={x:Static local:MySettings.Default}}"/>
        </Grid.Background>
        <Viewbox Margin="15,5">
            <Label x:Name="TimeText" Content="00:00" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Padding="0"
                  FontFamily="{Binding FontFamily, Mode=TwoWay, Source={x:Static local:MySettings.Default}}"
                  FontWeight="{Binding FontWeight, Mode=TwoWay, Source={x:Static local:MySettings.Default}}"
                  FontStyle="{Binding FontStyle, Mode=TwoWay, Source={x:Static local:MySettings.Default}}">
                <Label.Foreground>
                    <SolidColorBrush Color="{Binding ForegroundColor, Mode=TwoWay, Source={x:Static local:MySettings.Default}}"/>
                </Label.Foreground>
            </Label>
        </Viewbox>
    </Grid>
</Window>