Platonenkov

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:p="http://schemas.microsoft.com/winfx/2006/xaml/presentation/options"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <SolidColorBrush x:Key="WhiteBrush" Color="White" p:Freeze="True"/>

    <!--форма переключателя-->
    <ControlTemplate x:Key="ToggleButtonCheckBoxTemplate" TargetType="{x:Type CheckBox}">
        <ControlTemplate.Resources>
            <SolidColorBrush x:Key="ToggleButton.CheckedBackgroundBrush" p:Freeze="true">DarkBlue</SolidColorBrush>