qltab generates tabs within an article.
The plugin uses either the internal styles (if "use plugin style" set to "yes"). Then you can set background and font colors via the plugin. Otherwise it will use the templates' stylings (if "use plugin style" set to "no").
PS: I wrote this extension for Joomla! 3.x; for a nice extension I used to use in J! 2.5 wouldn't work here. So I helped myself. Hope you like it.