如何在epplus中使用c#为excel中的整列上色

我已经编写了一个代码，为与单元格中文本匹配的单个单元格着色，但我想为标题行中具有匹配文本的整列着色

using System.Drawing;
using OfficeOpenXml;
using OfficeOpenXml.Style;
using System.IO;
namespace Project32
{
public class Class1
{
    public static void Main()
    {
        FileInfo newFile = new FileInfo(@"C:'Users'mvmurthy'Downloads'Template.xlsx");
        ExcelPackage pck = new ExcelPackage(newFile);
        var ws = pck.Workbook.Worksheets["ImportTemplate"];
        var start = ws.Dimension.Start;
        var end = ws.Dimension.End;
        for (int col = start.Column; col <= end.Column; col++)
        { // ... Cell by cell...
            if (ws.Cells[1, col].Text == "Tracking Numbers")
            {
                ws.Cells[1, col].Style.Fill.PatternType = ExcelFillStyle.Solid;
                ws.Cells[1, col].Style.Fill.BackgroundColor.SetColor(Color.Red);
            }
        }
        pck.Save();
    }
}

}

excelWorksheet.Column(i).Style.Fill.PatternType = ExcelFillStyle.Solid;
excelWorksheet.Column(i).Style.Fill.BackgroundColor.SetColor(ColorTranslator.FromHtml("#FF00CC"));