KDE is one of the best things that have happened to Linux and X in a long time. It provides a consistent user interface that goes a long way towards making Linux accessable to the average non-geek. More information about KDE can be found at http://www.kde.org/. So why am I singing it's praises here? This is because KDE 1.1 has a new feature that will make the fonts & colors in your programs, including non-KDE applications consistent with KDE's current style.
This is very easy. Simply start up the KDE Control Center, go to Desktop, and go to Style inside Desktop. In there, there will be a toggle switch labled "Apply fonts and colors to non-KDE apps". Turn it on, click OK, and your done! The next time you start up many X applications, they will use the same colors and fonts that your KDE applications do. Some people may like this feature better than others, but if you don't like it you can always turn it off.