These lists are not 100% complete and/or accurate and probably never will be. There was a patch made to Joomla 1.6 in September 2010 to make the class and ID naming more consistent. These lists DO NOT reflect these changes. However, it is estimated that these lists are still about 90% accurate.
These links will take you to pages which contain lists of Joomla! 1.6 Core CSS Classes and IDs.
Feel free to correct any errors or omissions you find by editing of these lists. If you do not/cannot/will not do the direct editing, use the Discussion Page for an explanation of and suggested fix for the problem.