HandyControl/src/Avalonia/HandyControl_Avalonia/Themes/Styles/Label.axaml

<ResourceDictionary xmlns="https://github.com/avaloniaui"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <ControlTheme x:Key="LabelBaseStyle"
                  TargetType="Label">
        <Setter Property="Foreground"
                Value="{DynamicResource TextIconBrush}" />
        <Setter Property="Background"
                Value="{DynamicResource RegionBrush}" />
        <Setter Property="BorderBrush"
                Value="{DynamicResource BorderBrush}" />
        <Setter Property="CornerRadius"
                Value="{StaticResource DefaultCornerRadius}" />
        <Setter Property="Padding"
                Value="{StaticResource DefaultControlPadding}" />
        <Setter Property="HorizontalContentAlignment"
                Value="Center" />
        <Setter Property="VerticalContentAlignment"
                Value="Center" />
        <Setter Property="HorizontalAlignment"
                Value="Center" />
        <Setter Property="VerticalAlignment"
                Value="Center" />
        <Setter Property="Height"
                Value="{StaticResource DefaultControlHeight}" />
        <Setter Property="Template">
            <ControlTemplate>
                <ContentPresenter Name="PART_ContentPresenter"
                                  Padding="{TemplateBinding Padding}"
                                  HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                                  VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
                                  Background="{TemplateBinding Background}"
                                  BorderBrush="{TemplateBinding BorderBrush}"
                                  BorderThickness="{TemplateBinding BorderThickness}"
                                  Content="{TemplateBinding Content}"
                                  ContentTemplate="{TemplateBinding ContentTemplate}"
                                  CornerRadius="{TemplateBinding CornerRadius}"
                                  RecognizesAccessKey="True" />
            </ControlTemplate>
        </Setter>

        <Style Selector="^:disabled">
            <Setter Property="Opacity"
                    Value="0.4" />
        </Style>
    </ControlTheme>

    <ControlTheme x:Key="LabelDefault"
                  BasedOn="{StaticResource LabelBaseStyle}"
                  TargetType="Label">
        <Setter Property="Foreground"
                Value="{DynamicResource PrimaryTextBrush}" />
        <Setter Property="BorderThickness"
                Value="1" />
    </ControlTheme>

    <ControlTheme x:Key="{x:Type Label}"
                  BasedOn="{StaticResource LabelDefault}"
                  TargetType="Label" />

    <ControlTheme x:Key="LabelDefault.Small"
                  BasedOn="{StaticResource LabelDefault}"
                  TargetType="Label">
        <Setter Property="Height"
                Value="20" />
        <Setter Property="Padding"
                Value="6,0" />
    </ControlTheme>

    <ControlTheme x:Key="LabelPrimary"
                  BasedOn="{StaticResource LabelBaseStyle}"
                  TargetType="Label">
        <Setter Property="Background"
                Value="{DynamicResource PrimaryBrush}" />
    </ControlTheme>

    <ControlTheme x:Key="LabelPrimary.Small"
                  BasedOn="{StaticResource LabelPrimary}"
                  TargetType="Label">
        <Setter Property="Height"
                Value="20" />
        <Setter Property="Padding"
                Value="6,0" />
    </ControlTheme>

    <ControlTheme x:Key="LabelSuccess"
                  BasedOn="{StaticResource LabelBaseStyle}"
                  TargetType="Label">
        <Setter Property="Background"
                Value="{DynamicResource SuccessBrush}" />
    </ControlTheme>

    <ControlTheme x:Key="LabelSuccess.Small"
                  BasedOn="{StaticResource LabelSuccess}"
                  TargetType="Label">
        <Setter Property="Height"
                Value="20" />
        <Setter Property="Padding"
                Value="6,0" />
    </ControlTheme>

    <ControlTheme x:Key="LabelInfo"
                  BasedOn="{StaticResource LabelBaseStyle}"
                  TargetType="Label">
        <Setter Property="Background"
                Value="{DynamicResource InfoBrush}" />
    </ControlTheme>

    <ControlTheme x:Key="LabelInfo.Small"
                  BasedOn="{StaticResource LabelInfo}"
                  TargetType="Label">
        <Setter Property="Height"
                Value="20" />
        <Setter Property="Padding"
                Value="6,0" />
    </ControlTheme>

    <ControlTheme x:Key="LabelWarning"
                  BasedOn="{StaticResource LabelBaseStyle}"
                  TargetType="Label">
        <Setter Property="Background"
                Value="{DynamicResource WarningBrush}" />
    </ControlTheme>

    <ControlTheme x:Key="LabelWarning.Small"
                  BasedOn="{StaticResource LabelWarning}"
                  TargetType="Label">
        <Setter Property="Height"
                Value="20" />
        <Setter Property="Padding"
                Value="6,0" />
    </ControlTheme>

    <ControlTheme x:Key="LabelDanger"
                  BasedOn="{StaticResource LabelBaseStyle}"
                  TargetType="Label">
        <Setter Property="Background"
                Value="{DynamicResource DangerBrush}" />
    </ControlTheme>

    <ControlTheme x:Key="LabelDanger.Small"
                  BasedOn="{StaticResource LabelDanger}"
                  TargetType="Label">
        <Setter Property="Height"
                Value="20" />
        <Setter Property="Padding"
                Value="6,0" />
    </ControlTheme>
</ResourceDictionary>