c# epplus not filling background color of cell

Ok I am stumped the set font works and sets the correct cell. The Fill.BackgroundColor.SetColor does not work. It literally does nothing. Am I missing something? Every search I do that syntax should work.
Yes this is reading a data table dt that is not the issue the loop works properly.

int startupRow = 2; // row 1 is header

for (int row = startupRow; row <= dt.Rows.Count; row++)
    //if allocation check is populated it will have a value > 0
    if (Convert.ToInt32(workSheet.Cells(row, 8).Value) > 0)
        //if Balance Remaining Barrels <  allocation check
        if (Convert.ToInt32(workSheet.Cells(row, 7).Value) < Convert.ToInt32(workSheet.Cells(row, 8).Value))
            //set the font to red 
            var cell = workSheet.Cells(row, 7);
            cell.Style.Font.Bold = true;

            //Setting the background color to red
            cell.Style.Fill.PatternType = OfficeOpenXml.Style.ExcelFillStyle.Solid;