One of my customer reported that whenever he assign the color categories to his Outlook items (in Outlook 2007), he facing an unique issue. For example, if he chooses the color category - a dark color except black, whenever he took the printout it prints lighter than the other color categories; which leads him trouble to isolate it from other color. This is not a programming issue.
This issue is fixed in the Outlook 2007 post-Service Pack 1 hotfix package that is dated September 24, 2008. It's recommended to download this package and install the hotfix as recommended.