Styles.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Style x:Key="ButtonStyle" TargetType="{x:Type ToggleButton}">
        <Setter Property="BorderBrush">
            <Setter.Value>
                <SolidColorBrush Color="#FFE6E6E6"/>
            </Setter.Value>
        </Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ToggleButton}">
                    <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0.8" CornerRadius="3">
                        <TextBlock Foreground="{TemplateBinding BorderBrush}" Text="{TemplateBinding Content}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="IsMouseOver" Value="True">
                <Setter Property="Background" Value="Red"/>
            </Trigger>
        </Style.Triggers>
        
    </Style>

    <Style TargetType="ToggleButton" x:Key="Button_Command">
        <Setter Property="Foreground" Value="#a0a0a0"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ToggleButton}">
                    <Border x:Name="ButtonBackground" BorderBrush="White">
                        <ContentPresenter VerticalAlignment="Center" HorizontalAlignment="Left" Margin="20,0,0,0"/>
                        <Border.BorderThickness>1</Border.BorderThickness>
                        <Border.CornerRadius>2</Border.CornerRadius>
                        <Border.Background>
                            <SolidColorBrush Color="#3d3d3d"/>
                        </Border.Background>
                        
                    </Border>
                    
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="ButtonBackground" Property="Background">
                                <Setter.Value>
                                    <SolidColorBrush Color="#FF4E4F51"/>
                                </Setter.Value>
                            </Setter>
                        </Trigger>
                        <Trigger Property="IsChecked" Value="True" >

                            <Setter TargetName="ButtonBackground" Property="Background">
                                <Setter.Value>
                                    <SolidColorBrush Color="#FF666B70"/>
                                </Setter.Value>
                            </Setter>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style TargetType="ScrollBar">
        <Setter Property="Background" Value="#3d3d3d"/>
        <Setter Property="BorderBrush" Value="White"/>
    </Style>
    

</ResourceDictionary>