Hello,
The issue about setting background color for subtotals pivot has been resolved. Please download and test the new hotfix Spire.Office Platinum (Hot Fix) Version:2.8.2 (http://www.e-iceblue.com/Download/downl ... t-now.html).
If you get any questions, welcome to get it back to us.
Thanks and Regards,
Benjamin
E-iceblue support team