It sounds as if you're working with a shared workbook. You will need to
unshare the workbook by clicking TOOLS in the menu, selecting SHARE WORKBOOK
and then remove the checkmark from the ALLOW EDITING... check box on the
EDITING tab of the dialog box.
I have done that already, and it does not change anything. I do have it
protected, with certain permissions on it. WIll that not let the tab color be
changd?