Unwanted Fill Color Changes
 

I was working in a file when I opened an Excel file my boss sent in an email.
I opened it from the email, not downloading it first. After I closed it I
noticed my file took on all of the fill and text color formating she had in
her file -- which unfortunately was pinks and yellows. Not only can I not
get my color options back, it seems that all of my existing excel files now
also take on the new formats. HELP!! QUICKLY PLEASE!!
--
Barb