keep heading color when converting a .doc to .pdf

Hi guys,
When I convert a Word .doc file into a pdf (File>Print>PDF), my headings that are in grey font become black on the pdf. How could I keep the greyscale on the pdf? I use Word X and Acrobat 9 Pro.
Thanks!

Oups, found it myself... The heading appears in grey in Word but is in fact coded in black (when double-click on heading, it shows up in black). So one just needs to highlight the heading and convert it to grey color (doesn't change its appearance in Word, but well in Acrobat).