Change css for specific group

Hi Mike,
You can implement this functionality by creating a DevExpress.ExpressApp.Web.Layout.LayoutGroupTemplate class descendant, and overriding its LayoutContentControls method to create layout group controls. For example, based on the base class implementation:

C#
public class ColoredLayoutGroupTemplate : LayoutGroupTemplate  
{  
    public ColoredLayoutGroupTemplate() : base() { }  

    protected override void LayoutContentControls(LayoutGroupTemplateContainer templateContainer, IList<System.Web.UI.Control> controlsToLayout)  
    {  
        if (templateContainer.ShowCaption && (!templateContainer.IsOnTabPage || (templateContainer.ParentGroupDirection == FlowDirection.Vertical)))  
        {  
            Literal child = new Literal();  
            child.Text = templateContainer.Caption;  
            Table table = RenderHelper.CreateTable();  
            table.CssClass = "GroupHeader";  
            table.Rows.Add(new TableRow());  
            table.Rows[0].Cells.Add(new TableCell());  
            table.Rows[0].Cells[0].CssClass = "Label";  
            table.Rows[0].Cells[0].Controls.Add(child);  
            if (templateContainer.HasHeaderImage)  
            {  
                ASPxImage image = new ASPxImage();  
                ASPxImageHelper.SetImageProperties(image, templateContainer.HeaderImageInfo);  
                image.AlternateText = templateContainer.Caption;  
                table.Rows[0].Cells.AddAt(0, new TableCell());  
                table.Rows[0].Cells[0].CssClass = "Image";  
                table.Rows[0].Cells[0].Controls.Add(image);  
            }  
            templateContainer.Controls.Add(table);  
        }  
        //--- create a colored panel, and add content controls into it  
        Panel panel = new Panel();  
        string groupId = templateContainer.Info.GetAttributeValue("ID");  
        if (groupId.EndsWith("$red"))  
        {  
            panel.BackColor = System.Drawing.Color.Red;  
        }  
        foreach (System.Web.UI.Control control in controlsToLayout)  
        {  
            panel.Controls.Add(control);  
        }  
        templateContainer.Controls.Add(panel);  
        templateContainer.Visible = templateContainer.IsContentVisible;  
    }  
}  

To use this template, create a detail view controller, and assign this template instance to the WebLayoutManager:

C#
public class ColoredGroupsViewController : ViewController  
{  
    public ColoredGroupsViewController()  
    {  
        this.TargetViewType = ViewType.DetailView;  
    }  

    protected override void OnActivated()  
    {  
        base.OnActivated();  
        WebLayoutManager lm = ((DetailView)View).LayoutManager as WebLayoutManager;  
        if (lm != null)  
            lm.LayoutGroupTemplate = new ColoredLayoutGroupTemplate();  
    }  
}  

A sample project, demonstrating this approach is in the attachment. Please let us know if this makes sense.
Thanks,
Michael.