I did this back in Windows 3.1 but that may not apply today.
https://duckduckgo.com/?q=change+font+color+in+drop+down+list+windows+ seems to write this is up to the app's author and not a global setting.
http://windows.microsoft.com/en-US/windows7/Change-Windows-fonts seems to list some but not all areas and my bet is that the Application must work to achieve this goal.
I am trying to change the fonts in windows using the changing windows and colours metrics in control panel. I already managed to change them in all except the ones in drop down boxes.
Does anyone know what theyre called in the item list or where to find a comprehensive guide that displats each of the items listed?