Color box unavailable on Patterns tab in "format data series"
 

I have a user who is working with some charts and can not edit the color box
(is grayed out) on the patterns tab in €œformat data series€�. We feel it is
a user setting or something because a different user can pull in the same
spreadsheet and edit the color of a graph bar just fine€¦ Has anyone
encountered this? Any suggestions?