In Mac OS X many people prefer to use the Graphite theme, in which all window controls use the same color: Default Aqua theme (red, yellow, green / close, minimize, maximize): <a href="http://img170.imageshack.us/img170/622/picture1ve7.png">http://img170.imageshack.us/img170/622/picture1ve7.png</a> Alternative Graphite theme (can be set from System Preferences): <a href="http://img76.imageshack.us/img76/1209/picture2yz5.png">http://img76.imageshack.us/img76/1209/picture2yz5.png</a> Basically, the colors are an extra in this case