I found the following response in another forum. So the problem is in Microsoft Word, not Acrobat. In the original Word document, go to Design > Page Background > Page Color > check the "No Color" box. THEN save it as a pdf. This worked for me ~
I did get it fixed. For some reason Word was not showing the true
page color (which somehow was turned to blue). I went into page
background color (under page layout) and clicked the no color option.
This seems to have worked for me.