One of the best and most effective Joomla! Admin Panel Branding is available here:
http://extensions.joomla.org/extensions/administration/admin-templates/17622This has some nice features such as:
* Hide footer copyright info from admin and login page. This just hides using css, originally it’s exits in html
* Show/hide Header background color
* Add custom background color for header
* Choose rounded corner for header section. CSS3 rounded corner
* Choose gradient for header, choose gradient start and color. should support for IE6-IE9 and other modern browsers. We doesn’t care if rounded and gradient doesn’t work in old browser !
* Login Page
** Show/hide the login box title or hide text “Joomla! Administration Login” (From V2.0)
** Change the login title “Joomla! Administration Login” with a custom logo
** Show/hide the lock image
** Change default lock image with any custom image
* Admin Page
** Show/hide the default joomla logo
** Replace default joomla logo with any custom image
** Show/hide site title
** Change title text color
** Show/hide Joomla version number
** Change version text color
