Styling a dropdown menu - font color

Hi,

I did some research and figured out how to add a css insert to make the drop down background color different from the main menu bar. Now I'd like to make the font color in that drop down different from the color of the text in the main menu bar.

If you want to take a look:

http://www.prestonarza.com/

I'm referring to the top menu. I'd like to make text in the dark blue drop down white and leave the text in the main menu black.

Any ideas?

Thanks,
Sharon