FuzzGuard

Want to style your Admin login pages for your clients in their corporate colors? Sick of the default wordpress wp-admin login page? Then this plugin maybe for you. It allows you to style the WordPress Admin Panel login page that comes default with every wordpress installation.
You can do the following:
<pre><code>* Upload and set your own logo for the Admin Panel login page
* Upload and set your own logo for the Admin Panel Menu (This replaces the DASHBOARD menu option)
* Set the background color of the Admin Panel login page
 * Set the background colour of the Username/Password boxes.
 * Set the background colour of the 'Log in' button
 * Set the background color of the Login Box.
* Set the color of the footer text.
* Set the colour of the text in the Login box.
* Set the colour of the 'Log in' text on the 'Log in' button 
* Set to have CSS rounded corners on your login box and the 'Log in' button
</code></pre>
Usually this require’s modification of CSS code to have the changes stick. This can lead to changes being overwritten on theme updates. This plugin is simple and allows you to easily change the options between your custom choices and the default ones that are set for your theme.

Style Admin

Want to style your Admin login pages for your clients in their corporate colors?  Sick of the default wordpress wp-admin login page?  Then this plugin …

Access Keys

AccessPress Custom CSS is a FREE plugin to add your own custom css to your site that will override plugins and theme’s default stylesheets. With this plugin you can put custom css code without editing your theme and/or your plugins files (really useful in case of any theme/plugin update). This is very easy to use plugin.
<h4>Features:</h4>
<ul>
<li>Add your custom css to a site.</li>
<li>Syntax Highlighter supports(by CodeMirror) color and tab support for write a good css code.</li>
<li>Lightweight – Installs in seconds.</li>
<li>User friendly – very easy to configure and setup.</li>
<li>Super support – get support via email/support forum/online chat.</li>
</ul>
AccessPress Custom CSS works best with every WordPress theme. Its even more remarkable when used with popular themes like VMagazine and AccessPress Parallax.
<h4>Some Useful Links</h4>
<ul>
<li>Support Email: support@accesspressthemes.com</li>
<li>Support Forum Link: http://accesspressthemes.com/support/</li>
<li>Youtube channel link: https://www.youtube.com/watch?v=TjZNcVG3fDE</li>
<li>Facebook link: https://www.facebook.com/AccessPressThemes</li>
</ul>

Style Admin vs AccessPress Custom CSS