Simple Custom CSS – WordPress plugin Free download
Simple Custom CSS
Description
An easy-to-use WordPress Plugin to add custom CSS styles that override Plugin and Theme default styles. This plugin is designed to meet the needs of administrators who would like to add their own CSS to their WordPress website. Styles created with this plugin will render even if the theme is changed.
New in Version 4.0
Customizer Control (finally!)
Tested for WP version 4.9.4
Code linting (error checking) on the settings page
Features
Customizer Control
Active Plugin Support
Useful Code Syntax Highlighter
No configuration needed
Simple interface built on WordPress UI
Virtually no impact on site performance
No complicated database queries
Thorough documentation
Allows Administrator access on Multisite
Screenshots

The Simple Custom CSS Administration Screen

The Simple Custom CSS Customizer Section
Installation
Install Simple Custom CSS just as you would any other WP Plugin:
Click to Download Simple Custom CSS from WordPress.org.
Unzip the .zip file.
Upload the Plugin folder (simple-custom-css/) to the wp-content/plugins folder.
Go to Plugins Admin Panel and find the newly uploaded Plugin, “Simple Custom CSS” in the list.
Click Activate Plugin to activate it.
Begin using the plugin by going to Appearance > Custom CSS in the Admin Menu, or Appearance > Customize, then click on the “Simple Custom CSS” section.
FAQ
Installation Instructions
Install Simple Custom CSS just as you would any other WP Plugin:
Click to Download Simple Custom CSS from WordPress.org.
Unzip the .zip file.
Upload the Plugin folder (simple-custom-css/) to the wp-content/plugins folder.
Go to Plugins Admin Panel and find the newly uploaded Plugin, “Simple Custom CSS” in the list.
Click Activate Plugin to activate it.
Begin using the plugin by going to Appearance > Custom CSS in the Admin Menu, or Appearance > Customize, then click on the “Simple Custom CSS” section.
Will this Plugin work on my WordPress.com website?
Sorry, this plugin is available for use only on self-hosted (WordPress.org) websites.
My Custom CSS isn’t showing up
There are several reasons this could be happening:
Your CSS is targeting the wrong selector.
Your CSS selectors aren’t specific enough.
For instance, you may have:
a {
color: #f00;
}
When you need:
\#content a {
color: #f00;
}
The specificity you need depends upon the CSS rules you are attempting to override.
Your CSS isn’t valid.
Please check your CSS at the W3C CSS Validation Service.