Hi Rekha,
Attached is a sample link which helps you to export the GridGrouping data to excel along with the backcolor applied to the cells.
http://websamples.syncfusion.com/samples/Grid.Web/5.1.0.51/Forum-63322/main.htmIn this sample I have applied 'Red' color to the Cell with the value 'London' in the 'City' column and 'Yellow' color to the cell 'Germany' in the 'Country' column.
When you click the Export button the data of the GridGrouping control gets exported to the Excel along with the background color which has been applied to the cell.
Please let me know if this satisfies your requirement.
Regards,
Valli