Goran Petrovic

This utility plugin allow you to change font family, colors and backgrounds of any element on your theme using Customize 
interface.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/0rESNVbxulo?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent&listType=playlist&list=PLUDxG30KAdnrme6JDRH-r3IipKPqyoeIo" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
<a href="https://www.youtube.com/watch?v=0rESNVbxulo&list=PLUDxG30KAdnrme6JDRH-r3IipKPqyoeIo" rel="nofollow ugc">Video Tutorials</a>
Very simple add your CSS selectors and choice CSS options then open Customize and change page element style.
Options
<ul>
<li>Google fonts</li>
<li>Display</li>
<li>Font color</li>
<li>Font family</li>
<li>Background</li>
</ul>
Features
<ul>
<li>Easy to use</li>
<li>Compatibilty with any theme or plugin</li>
<li>Browsers supported</li>
<li>Simple interface</li>
<li>Responsive options</li>
<li>Generate CSS code</li>
</ul>

WP CSS Generator

Preporuka!

Customize you WP page elements easy and fast. Get full control over any element or property.

benohead

amazingweb GmbH

With this plugin, you can easily add custom CSS styles to override styles provided in themes and plugins without having to modify their code. In this way your modifications will remain after an update of the theme or plugins.
You define CSS styles in a nice editor with syntax highlighting, undo/redo, find/replace, zoom in/out and line wrapping. 
If the editor is too small, you can switch to full screen mode and switch back when you are done.
Before being applied, your code will be compressed (minified) in order to make sure your site still loads as fast as possible.
If you do not want to apply the defined CSS styles everywhere on your site, there are many possibilities to suppress those styles:
<ul>
<li>on specific post or page types</li>
<li>on specific posts or pages</li>
<li>for logged in users</li>
<li>for specific post formats</li>
<li>for specific languages (requires qTranslate or mqTranslate to be installed)</li>
<li>for specific URL paths</li>
<li>for specific referrers</li>
<li>for specific IP addresses</li>
</ul>
Simple to use, powerful and with a low footprint. Just give it a try !

WP Style It

Add Custom CSS to your WordPress site without modifying your theme or plugins.

WP CSS Generator vs WP Style It