'Declaration Public ReadOnly Property Palette As WorkbookColorPalette
public WorkbookColorPalette Palette {get;}
When the file is opened in Microsoft Excel 2003 and earlier versions, the actual colors used in cells and shapes may not be displayed. Instead, the closest color in the palette will be displayed instead. Therefore, the palette can be customized if necessary to keep the colors as accurate as possible in older versions of Excel.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2