TreeList MVC Selected Node Back Color

I am having tree list where i want to set some back color of my choice.

settings.Styles.SelectedNode.BackColor = System.Drawing.Color.FromArgb(0, 170, 198);

But even though i have set this property when i select node by default i am having different color as dark blue.

I dont know why this is happening. Please find the code snippet below of my treelist.

HTML
@Html.DevExpress().TreeList(  
    settings =>  
    {  
        settings.Name = "treeList";  
        settings.CallbackRouteValues = new { Controller = "Home", Action = "treePartial" };  

        settings.ControlStyle.Border.BorderWidth = 0;  
        settings.Styles.Cell.Paddings.PaddingLeft = System.Web.UI.WebControls.Unit.Pixel(1);  
        settings.SettingsLoadingPanel.Enabled = false;  

        settings.Columns.Add(  
            column =>  
            {  
                column.FieldName = "NodeDescription";  
                column.PropertiesEdit.EncodeHtml = false;  
            }  
        );  

        settings.SettingsEditing.AllowNodeDragDrop = true;  

        settings.SettingsEditing.NodeDragDropRouteValues = new { Controller = "Home", Action = "treePartial" };  
        settings.AutoGenerateColumns = false;  
        settings.KeyFieldName = "Key";  
        settings.ParentFieldName = "ParentKey";  
        settings.RootValue = "0";  

        settings.SettingsBehavior.AllowFocusedNode = true;  

        settings.Styles.FocusedNode.BackColor = System.Drawing.Color.FromArgb(0, 170, 198);  
        settings.Styles.SelectionCell.BackColor = System.Drawing.Color.FromArgb(0, 170, 198);  
        settings.Styles.SelectedNode.BackColor = System.Drawing.Color.FromArgb(0, 170, 198);  

        settings.SettingsBehavior.FocusNodeOnLoad = false;  

        settings.HtmlRowPrepared = (s, e) =>  
        {  
            e.Row.Attributes.Add("onmouseover", "this.setAttribute('bgColor', this.style.backgroundColor); this.style.backgroundColor = '#00AAC6';");  
            e.Row.Attributes.Add("onmouseout", "this.style.backgroundColor = this.getAttribute('bgColor');");  
        };  


        settings.Settings.ShowColumnHeaders = false;  
        settings.ClientSideEvents.StartDragNode = "DragDropHelper.StartDragNode";  
        settings.ClientSideEvents.EndDragNode = "DragDropHelper.EndDragNode";  
    }  
).Bind(Model).GetHtml()