Admin CSS MU


A simple plugin that lets you add your custom CSS to style the WordPress Admin. Works with WordPress single install and WordPress multisites.

Version 2.0 is updated wtih an Admin interface and can be found in Appearance > Admin CSS MU

Note: If you want to easily add custom CSS on your Login and Front-end as well (along with WordPress Admin), use my Custom Login Admin Front-end CSS plugin instead.


  • Admin Interface in Appearance > Admin CSS MU


To use as a normal plugin in WordPress single install and Multisite.

  1. Install the plugin through the WordPress admin interface, or upload the folder /admin-css-mu/ to /wp-content/plugins/ using ftp.
  2. Activate the plugin via WordPress admin interface. If it is a Multisite, Network Activate it.
  3. Go to WordPress Admin > Appearance > Admin CSS MU and add the custom CSS you want.
  4. For Multisites, the settings page will be in the Appearance > Admin CSS MU of the main site. Only network admins can add/edit CSS.

I have included some CSS samples in the FAQ page.


Some CSS Samples

To change the background colour of the dashboard:

#wpwrap {
    background-color: #FFFBCC !important;


Great and simple plugin but limited

Hi dev, the plugin interface so great, but the functionality of overwriting the whole css is limited what we can do.., plugin like Add Admin Css make the work done. but the interface is bad

I also minify my css, when I put it on this plugin.. it makes it pretty and its kinda weird as it break the rule what I try to achieve

User interface

As advertised!

it took a bit of trial and error to get it working, but that was almost entirely due to me being pretty new with WP Network … and the plugin author was quick to help me out when I posted on someone else’s review. Excellent all around!

Read all 3 reviews

Contributors & Developers

“Admin CSS MU” is open source software. The following people have contributed to this plugin.




  • Tested with WordPress 4.7.
  • Uses wp_kses() instead of esc_html() during output to prevent stripping of useful html tags.
  • Minor bug fixes.


  • Updated multisite compatibility.
  • Appearance > Admin CSS MU is now visible only on the main website.


  • Added an admin interface in Appearance > Admin CSS MU.
  • Tested with WordPress 4.5.


  • Code updates.
  • Tested with WordPress 4.4.2.
  • Changed the location of custom stylesheet into /wp-content/uploads/admin-css-mu/ while preserving the original folder for backward compatiblity with version 1.0


  • First release of the plugin.