Created attachment 138152 [details]
Example file made with Excel 2013

If we create a simple 3D Pie chart in Microsoft Office Excel and we save it as XLSX with LibreOffice Calc and re-open with Microsoft Office Excel the “drawing area” gets a gray background color.

Steps to reproduce:
1. Create a new spreadsheet in Microsoft Excel.
2. Add values to a few cells in a column.
3. Select the cell range that contains the data.
4. Create a simple 3D Pie chart in Microsoft Excel and save the file as XLSX.
5. Open the file with LibreOffice Calc and save it as XLSX.
5. Open the file in Microsoft Office Excel and compare it with the original file.

Actual results:
The background color of “drawing area” in the 3D Pie chart is gray.

Expected results:
The background color of “drawing area” in the 3D Pie chart should be white. The original setting of the “drawing area” is automatic (white) in Microsoft Excel.