WP Panel - Admin Branding
Customise how the WordPress dashboard looks for you and your users in WP Panel. By accessing the settings panel, and visiting "Admin Branding", you can control various features such as the colour of the top bar and side menu bar within the WordPress menu, change the name of your WordPress theme (currently won't work will all themes) and add in custom css to control how the WordPress dashboard looks.
Visit www.wp-panel.co.uk to download WP Panel - the custom WordPress dashboard plugin.