Add Custom CSS to WordPress Admin

By  on  

Believe it or not, I spend an awful lot of time going through my blog's comments and correcting spelling issues, code formatting, etc.; yes, even the comments from way back to 2007.  It's mostly for quality control purposes and ease of reading for my readers, especially the code comments.

One gripe I have with WordPress' admin section is that it's difficult to spot <pre> tag contents, especially code samples that are only one line.  It made me think: "wouldn't it be awesome if I could add my own styles to the WordPress admin interface?"  If it's awesome, I want to do it, so here's how you can add your own custom styles to WordPress admin!

Step 1:  Create Your CSS File

You can place the CSS file wherever you'd like; I've chosen to place the CSS file within my theme.  My admin CSS file looks like:

.wp-admin .comment pre {
  background: pink; /* they forgot the language! */
  padding: 6px 10px;
  font-size: 16px;
  border: 1px solid #ccc;
}

.wp-admin .comment pre[class] {
  background: #fff; /* language (likely) there */
}

The CSS above makes <pre> tags more visible.  It also will make any PRE element without a class more apparent, teling me I need to fix it by adding the language as a className.

Step 2:  Add Your CSS to WordPress Admin in functions.php

WordPress uses an add_action type of admin_enqueue_scripts for adding stylesheets anywhere within WordPress:

// Update CSS within in Admin
function admin_style() {
  wp_enqueue_style('admin-styles', get_template_directory_uri().'/admin.css');
}
add_action('admin_enqueue_scripts', 'admin_style');

get_template_directory_uri provides the path to your current theme, you simply need to add the filename to the end of the path.

If you get annoyed with WordPress Admin styles like myself, feel free to jump in and change them.  My update was very simple; if you want to completely overhaul the WordPress theme so your clients think they're getting a completely customized system, feel free to do so!

Recent Features

  • By
    39 Shirts &#8211; Leaving Mozilla

    In 2001 I had just graduated from a small town high school and headed off to a small town college. I found myself in the quaint computer lab where the substandard computers featured two browsers: Internet Explorer and Mozilla. It was this lab where I fell...

  • By
    How to Create a RetroPie on Raspberry Pi &#8211; Graphical Guide

    Today we get to play amazing games on our super powered game consoles, PCs, VR headsets, and even mobile devices.  While I enjoy playing new games these days, I do long for the retro gaming systems I had when I was a kid: the original Nintendo...

Incredible Demos

  • By
    Use Custom Missing Image Graphics Using MooTools

    Missing images on your website can make you or your business look completely amateur. Unfortunately sometimes an image gets deleted or corrupted without your knowledge. You'd agree with me that IE's default "red x" icon looks awful, so why not use your own missing image graphic? The MooTools JavaScript Note that...

  • By
    MooTools Kwicks Plugin

    I wrote a post titled Get Slick with MooTools Kwicks ages ago. The post was quite popular and the effect has been used often. Looking back now, the original code doesn't look as clean as it could. I've revised the original...

Discussion

  1. Kristy

    Thank you for this! It was extremely useful :)

  2. Paul

    It should be get_stylesheet_directory_uri() instead of get_template_directory_uri() if you’ve put the admin.css in a child theme.

  3. i’ve tried both get_template_directory_uri and get_stylesheet_directory_uri but getting some issues

  4. Matthew

    You can also use Custom CSS Injector plugin ( https://wordpress.org/plugins/css-injector/ ) to add custom CSS only to admin area.

  5. Use

    get_stylesheet_directory_uri()

    if you use a child theme.

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!