[DevExpress/WPF] TrackBarEdit - Background/SelectionColor

TrackBarEdit 에서 배경색과 선택된 영역의 색을 바꾸는 방법은
dxe:EditorAppearanceProperties.FocusedBorderBrush="Gray" 으로 배경색을 지정하고
선택된 영역은 <dxe:TrackBarRangeStyleSettings.SelectedRangeBackgroundStyle> 에서 아래와 같이 정의한다.

xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"

        <dxe:TrackBarEdit
            Grid.Row="1"
            Margin="10"
            Padding="10"
            dxe:EditorAppearanceProperties.FocusedBorderBrush="Gray"
            CornerRadius="4"
            Maximum="1"
            Minimum="0"
            SelectionEnd="0.8"
            SelectionStart="0.2"
            SmallStep="0.1"
            TickFrequency="0.1"
            TickItemDisplayMode="TickAndText"
            TickPlacement="BottomRight"
            Ticks="0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1"
            TrackHeight="8">
            <dxe:TrackBarEdit.StyleSettings>
                <dxe:TrackBarRangeStyleSettings>
                    <dxe:TrackBarRangeStyleSettings.SelectedRangeBackgroundStyle>
                        <Style TargetType="ContentControl">
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate>
                                        <Border
                                            Height="8"
                                            Margin="-10,0"
                                            VerticalAlignment="Center"
                                            Background="Black"
                                            CornerRadius="4" />
                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
                        </Style>
                    </dxe:TrackBarRangeStyleSettings.SelectedRangeBackgroundStyle>
                </dxe:TrackBarRangeStyleSettings>
            </dxe:TrackBarEdit.StyleSettings>
        </dxe:TrackBarEdit>

참고
https://docs.devexpress.com/WPF/DevExpress.Xpf.Editors.TrackBarEdit