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How to Safely Add Custom CSS Styles to Plugins

How to Safely Add Custom CSS Styles to Plugins

Has this ever happened to you? You install a plugin. It has the exact functionality you’re looking for. But…it just doesn’t look right. Even after you change all the settings, it still won’t fit your theme’s style. So, despite how well it works, you’re either slightly unhappy, or you throw it to the side and use something else.

If it has, you may have been able to get the best of both worlds by using custom CSS to style your plugin. Custom CSS styles allow you to change the appearance of your plugins, even if the developer hasn’t built styling options into the plugin settings.

This post is all about showing you how to properly add such styles, so that you’ll always keep them safe even if you update or change your theme.

Custom CSS Styles = More Control Over Plugins’ Appearance

Custom CSS styles allow you to manipulate the appearance of your plugins in ways beyond what the developer adds into the plugin options. Nowadays, many premium plugins include detailed styling options, but free plugins aren’t always comprehensive in this regard (if they include them at all).

Take one of the most popular plugins out there: Contact Form 7. It offers very little in the way of styling. But, through using custom CSS, you can completely change every aspect of how the forms display.

Plus, even plugins with detailed options don’t always give you the ability to change every style element you need to modify.

So, by learning a little CSS, and how to safely add that CSS to your theme, you gain a whole new level of power over how your plugins display to your readers.

Why It’s Important to Add Custom CSS the Right Way

You don’t want to go adding plugin CSS styles willy-nilly. As Nick hit on in his post about child themes, there’s a right way and a wrong way to go about adding CSS to WordPress.

When you add CSS styles the right way, they’ll always be safe, even if you update your theme, and you’ll be able to easily copy and paste them to a new theme if you ever decide to change your design.

Conversely, adding them improperly will put you at risk for losing your styles to a theme update or theme switch.

Now, I’ll go through how to properly add CSS plugin styles for both Divi and other WordPress themes.

Where to Add Plugin CSS Styles in Divi

To safely add plugin CSS styles to Divi, you’ll want to first go the “Theme Options” tab in your Divi menu:


Then, in the “General” tab (which will be the default tab loaded), you need to scroll all the way down to the bottom of the page. There, you’ll find a box called “Custom CSS”:

Divi CSS

Technically, all you need to do is enter your custom plugin CSS here and click “Save Changes.” But, because we want to make it really easy to move or copy all our plugin styles, let’s take it a step further.

Because you might have already added some custom Divi CSS snippets, it helps to organize the custom CSS in this box. To do that, you can add a comment saying something like “Plugin CSS Styles Start Here”. Then, you would only add your plugin CSS styles below that line.

To add such a comment, all you need to do is copy and paste this code:

/* Plugin CSS Styles Start Here */

Divi CSS comment

The comment won’t affect anything, but will help organize your various custom CSS styles. Divi will also keep your custom CSS styles safe during updates, so you don’t need to worry about losing them.

Where to Add Plugin CSS Styles for Other Themes

If you’re using a different theme, you’ll generally want to add your plugin custom styles to your child theme’s stylesheet. If you’re not using a child theme, or don’t know what one is, I definitely recommend you create one and start using it (here’s how you can do that!).

Assuming you have your child theme set up, you can modify it from inside your WordPress dashboard by going to Appearance > Editor:

Add custom CSS to WordPress themes

Make sure you’re editing the correct child theme. It should go to style.css by default. If it doesn’t, all you need to do is click on that option.

Then, you just need to add your custom plugin CSS exactly like I discussed in the Divi guide above. First, create a code comment along the lines of:

/* Plugin CSS Styles Start Here */

Then, add all your custom CSS styles below that line:

WordPress stylesheet

Because you’re working in a child theme, your styles will always be safe even if you update your theme. And because you’ve clearly commented them out, you can easily copy them to a new theme or a different WordPress install.

Real World Example: Contact Form 7

To really drive things home, let’s take a look at a real world example. Say you want to style a form for the aforementioned Contact Form 7. You installed the plugin and got a barebones looking form like this:

contact form

Now, you want to spice things up a bit by adding a black border to the form fields. You can go to your child theme’s stylesheet and add this code below the code comment you made (hint – this post is a great resource for styling Contact Form 7):

.wpcf7 input[type="text"],
.wpcf7 input[type="email"],
.wpcf7 textarea
    border: 1px solid #000000;

Your CSS should look like this:

Custom CSS in WordPress

After you save the stylesheet and refresh your contact form page, you should see this:

custom contact form

Notice the new black border? That’s all there is to it!

If you’re using Divi, your code would look the same, just in a different location:

Divi custom CSS

Of course, this is a bit of a thought experiment because you don’t really need a contact form plugin with Divi. But, the same idea will work with any plugin you need to add custom CSS styles to!

Wrapping Up

Adding custom plugin CSS styles to WordPress is a pretty simple process. The hardest part is knowing what CSS code you need to add. You won’t become a CSS expert overnight, but a good place to get started learning basic CSS is w3schools. And a good way to find which plugin element you need to target is the Google inspect element tool.

Just remember – always keep your custom plugin CSS in a separate area marked by a comment. That way, you can always find it. And if you’re using a non-Divi theme, be sure to keep all your custom styles in a child theme.

Do you have any plugin custom CSS style tips to share? I’d love to hear about them in the comments below!

Article thumbnail image by DreamUP / shutterstock.com 

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