This is pretty simple to achieve with OverrideBackground property. There are basically two options. I assume you use your schedule spreadsheet as the Data Set for the Widget.
Bind the OverrideBackground of the SubWidget that you use as a ticker template to the "Current" column of the spreadsheet. Then use the following script as converter to convert the "YES" case to a color, and any other case to a transparent color (or whatever color you want):
using System;
using ATVO.ThemesSDK;
using ATVO.ThemeEditor.ThemeModels;
using ATVO.ThemeEditor.Scripting.DotNET;
using System.Windows.Media;
namespace Scripts
{
public class ScheduleBackground : IScript
{
private Color CurrentColor = (Color) ColorConverter.ConvertFromString("#434343FF");
private Color NotCurrentColor = Colors.Transparent;
public object Execute(ThemeContentItem item, object value, string parameter, ISimulation sim)
{
if (value != null)
{
if (value.ToString() == "YES")
return CurrentColor;
}
return NotCurrentColor;
}
}
}