How to customize the background color of the task node in each row of Gantt in the WPF GanttControl

            <Style x:Key="TaskNode" TargetType="chart:GanttNode">
                <Setter Property="HorizontalAlignment" Value="Left"/>
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="chart:GanttNode">
                            <Canvas Height="11">
                                <Border Name="PART_Border"
                                Height="11"
                                Width="{TemplateBinding Width}"
                                HorizontalAlignment="Left"
                                VerticalAlignment="Center" 
                                SnapsToDevicePixels="True"
                                BorderThickness="0,0.4,0,0.4"
                                BorderBrush="Black">
                                    <i:Interaction.Behaviors>
                                        <local:GanttNodeCustomizationBehavior />
                                    </i:Interaction.Behaviors>
 
                                    …
 
                                </Border>
                            </Canvas>
                                   …
                            <ControlTemplate.Triggers>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
                 …
 
        <gantt:GanttControl x:Name="Gantt"
                            ItemsSource="{Binding TeamDetails}"
                            GridWidth="Auto">
            <gantt:GanttControl.TaskAttributeMapping>
                <gantt:TaskAttributeMapping TaskNameMapping="Name"
                                            TaskIdMapping="TaskId"
                                            StartDateMapping="StartDate" 
                                            ChildMapping="SubItems"
                                            FinishDateMapping="FinishDate"
                                            ProgressMapping="Progress"
                                            InLineTaskMapping="InLineItems"/>
            </gantt:GanttControl.TaskAttributeMapping>
            <gantt:GanttControl.Resources>
                <Style BasedOn="{StaticResource TaskNode}" TargetType="chart:GanttNode" />
            </gantt:GanttControl.Resources>
        </gantt:GanttControl>

 class GanttNodeCustomizationBehavior:Behavior<Border>
    {
        public static Random r = new Random();
 
        public static string[] nodeColors = new string[]
                                                {
                                                    "#FFFF0094", "#FFA500FF", "#FF00AAAD", "#FF8CBE21", "#FFA55100",
                                                    "#FFE771BD", "#FFF79608", "#FF18A2E7", "#FFE71400", "#FF319A31"
                                                };
 
        /// <summary>
        /// Called when [attached].
        /// </summary>
        protected override void OnAttached()
        {
            this.AssociatedObject.Loaded += new RoutedEventHandler(AssociatedObject_Loaded);
        }
 
        /// <summary>
        /// Handles the Loaded event of the AssociatedObject control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="System.Windows.RoutedEventArgs"/> instance containing the event data.</param>
        void AssociatedObject_Loaded(object sender, RoutedEventArgs e)
        {
            var name = ((e.OriginalSource as Border).DataContext as Item).Name;
            Border node = sender as Border;
            if (name == "Design Spec")
            {
                node.Background = (Brush)new BrushConverter().ConvertFromString(nodeColors[0]);
                node.BorderBrush = node.Background;
            }
            else if (name == "Requirement Spec")
            {
                node.Background = (Brush)new BrushConverter().ConvertFromString(nodeColors[1]);
                node.BorderBrush = new SolidColorBrush(Colors.Black); ;
            }
            else if (name == "Defining UI Design")
            {
                node.Background = (Brush)new BrushConverter().ConvertFromString(nodeColors[2]);
                node.BorderBrush = new SolidColorBrush(Colors.Black); ;
            }
            else if (name == "Completing Overall Graphics design")
            {
                node.Background = (Brush)new BrushConverter().ConvertFromString(nodeColors[3]);
                node.BorderBrush = new SolidColorBrush(Colors.Black); ;
            }
            else if (name == "Development Plan")
            {
                node.Background = (Brush)new BrushConverter().ConvertFromString(nodeColors[4]);
                node.BorderBrush = new SolidColorBrush(Colors.Black); ;
            }
            else if (name == "Self Testing")
            {
                node.Background = (Brush)new BrushConverter().ConvertFromString(nodeColors[5]);
                node.BorderBrush = new SolidColorBrush(Colors.Black); ;
            }
            
        }
 
        /// <summary>
        /// Called when [detaching].
        /// </summary>
        protected override void OnDetaching()
        {
            this.AssociatedObject.Loaded -= new RoutedEventHandler(AssociatedObject_Loaded);
        }
    }