This question already has an answer here:
6/15/2012 I'm having the same problem as a previous user's query (linked below) wherein I can't change the font or cell shading color on an Excel spreadsheet. I've confirmed that the cell/spreadsheet is NOT locked and have checked the conditional formatting function to make sure it is not affecting the worksheet. However, the problem remains. As a further clue, when I select "more colors" from the cell shading or font drop-down arrow the dialog box shows that the "current" color is the one I have selected for the cell, but the cell is not reflecting that color. Is it possible that my Excel has been corrupted or am I just too obtuse to figure it out? Any help will be GREATLY appreciated.