With this plugin you can use customize the appearance of the WordPress login page and dashboard.
Changed dashboard widget visibility settings for WordPress 3.8 widget changes
WordPress 3.8 compatibility fixes
Added an option for removing the RSS feed links from the head section of the html source.
The Customize Admin plugin now includes the possibility to select a background color for the login screen by using the color picker and you can now also add custom CSS code to style the WordPress login screen.
Changed get_bloginfo('siteurl') to get_bloginfo('url') to prevent notices from being displayed on the login screen when debug is enabled.
Added option to remove dashboard RSD and WLW meta tags and image size fix for login logo
Added option to remove selected dashboard widgets and a fix for an issue that was introduced by WordPress 3.4 which put the title tag value of the logo in the head section of the html.
Added option to remove generator meta tag from the head section of the html source.
Code cleanup, inclusion of option to remove the admin shadow which was introduced in WordPress 3.2.
Minor update, moved the Customize Admin Options page to the Settings menu.