OutlineText can make the text highlighted.

public class OutlineText: FrameworkElement

Attributes

Property	Description	Default Value	Remarks
StrokePosition	Outline Position	StrokePosition.Center
Text	Text
TextAlignment	Text Alignment	TextAlignment.Left
TextTrimming	Text truncation method	TextTrimming.None
TextWrapping	Text Wrapping	TextWrapping.NoWrap
Fill	Text color
Stroke	Outline Color
StrokeThickness	Outline thickness	0
FontFamily	Font
FontSize	Font Size
FontStretch	Font deformation method
FontStyle	Font Style
FontWeight	Font Weight

Case

<StackPanel Margin="32" Width="400">
    <hc:OutlineText TextWrapping="Wrap" Fill="{DynamicResource PrimaryTextBrush}" Text="{Binding Source='Text', Converter={StaticResource StringRepeatConverter}, ConverterParameter=20}"/>
    <hc:OutlineText Margin="0,10,0,0" FontSize="30" Fill="{DynamicResource SuccessBrush}" Text="{Binding Source='Text', Converter={StaticResource StringRepeatConverter}, ConverterParameter=8}"/>
    <hc:OutlineText Margin="0,10,0,0" Fill="{DynamicResource PrimaryTextBrush}" FontSize="30" FontStyle="Italic" Text="{Binding Source='Text', Converter={StaticResource StringRepeatConverter}, ConverterParameter=8}"/>
    <hc:OutlineText Margin="0,10,0,0" TextWrapping="Wrap" TextTrimming="CharacterEllipsis" FontSize="50" StrokeThickness="2" Fill="{DynamicResource DangerBrush}" Stroke="{DynamicResource PrimaryBrush}" Text="{Binding Source='Text', Converter={StaticResource StringRepeatConverter}, ConverterParameter=5}"/>
    <hc:OutlineText Margin="0,10,0,0" FontSize="80" FontWeight="Bold" StrokeThickness="4" Fill="{DynamicResource PrimaryBrush}" Stroke="{DynamicResource DangerBrush}" Text="{Binding Source='Text', Converter={StaticResource StringRepeatConverter}, ConverterParameter=2}"/>
    <hc:OutlineText Margin="0,10,0,0" StrokePosition="Outside" FontSize="80" FontWeight="Bold" StrokeThickness="4" Fill="{DynamicResource PrimaryBrush}" Stroke="{DynamicResource DangerBrush}" Text="{Binding Source='Text', Converter={StaticResource StringRepeatConverter}, ConverterParameter=2}"/>
    <hc:OutlineText Margin="0,10,0,0" StrokePosition="InSide" FontSize="80" FontWeight="Bold" StrokeThickness="4" Fill="{DynamicResource PrimaryBrush}" Stroke="{DynamicResource DangerBrush}" Text="{Binding Source='Text', Converter={StaticResource StringRepeatConverter}, ConverterParameter=2}"/>
</StackPanel>