Returns a color palette for the spreadsheet document.
A palette of 56 RGB colors.
A WorkbookColorPalette object defines a deprecated indexing color scheme that is still required for backwards compatibility with legacy formats. We recommend that you use document themes to change the appearance of your workbooks. Refer to the following API property for details: Theme.
A workbook palette contains a set of 56 RGB colors. The following image illustrates the default palette colors and their indexes: