Different background for each selection in a list

Hello,

I am creating a list. I need each item in the list to have a different background color. With the code I'm using the background color is white. I'm not sure what I'm doing wrong.

using Xamarin.Forms;
namespace App5
{
public partial class MainPage : ContentPage
{
public class ListItem
{
public string Title { get; set; }
public Color ForeColor { get; set; }
public Color BackgroundColor { get; set; }
}
public MainPage()
{
InitializeComponent();

        var listView = new ListView();
        listView.ItemsSource = new ListItem[] {

        new ListItem {Title ="Red", ForeColor = Color.White, BackgroundColor = Color.Red},
        new ListItem {Title ="Orange", ForeColor = Color.White, BackgroundColor = Color.Orange},
        new ListItem {Title ="Yellow", ForeColor = Color.White, BackgroundColor = Color.Yellow},
        new ListItem {Title ="Green", ForeColor = Color.White, BackgroundColor = Color.Green},
        new ListItem {Title ="Blue", ForeColor = Color.White, BackgroundColor = Color.Blue},
        new ListItem {Title ="Violet", ForeColor = Color.White, BackgroundColor = Color.Violet}
        };


        listView.RowHeight = 80;
        listView.ItemTemplate = new DataTemplate(typeof(ListItemCell));
        Content = listView;

        listView.ItemTapped += async (sender, e) => {
            ListItem item = (ListItem)e.Item;
            await DisplayAlert("Tapped", item.Title.ToString() + " was selected.", "Ok");
            ((ListView)sender).SelectedItem = null;
        };
    }
    class ListItemCell : ViewCell
    {
        public ListItemCell()
        {
            Label titleLabel = new Label
            {
                HorizontalOptions = LayoutOptions.FillAndExpand,
                FontSize = 25,
                FontAttributes = Xamarin.Forms.FontAttributes.Bold,
                TextColor = Color.White
            };
            titleLabel.SetBinding(Label.TextProperty, "Title");

            StackLayout viewLayoutItem = new StackLayout()
            {
                HorizontalOptions = LayoutOptions.StartAndExpand,
                Orientation = StackOrientation.Vertical,
                Children = { titleLabel}
            };

            StackLayout viewLayout = new StackLayout()
            {
                HorizontalOptions = LayoutOptions.StartAndExpand,
                Orientation = StackOrientation.Horizontal,
                Padding = new Thickness(25, 10, 55, 15),
                Children = { viewLayoutItem }
            };
            View = viewLayout;
        }
    }
}

}