TExcelColor.Index Property
Returns the color when this structure contains an indexed color (1 based). This property is for compatibility with xls files (Excel 2003 or older), but if you are not changing the color palette, even for older files, it is preferred to use RGB or Theme instead.
If you try to read the value of this property and ColorType is not the right kind, an Exception will be raised.
Syntax
Unit: FlexCel.Core
property TExcelColor.Index: Integer