When applying Color.Empty to a cell that previously contained a color, the cell still gets filled with Color.White
Then which color do you want to fill it into a cell?
None. Similar to the ‘No Fill’ action in Excel.
Please try :
cell.Style.ForegroundColor = Color.Empty;
cell.Style.BackgroundColor = Color.Empty;
cell.Style.Style.Pattern = BackgroundType.None;
Clearing the pattern did the trick! Thanks for the help.