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.

Bytes.co

Harness the power of pre-processed CSS and minified JS in your theme or plugin, without any complicated installs or build tools. Simply tell WP Compiler where to find your source files and where to put the compiled results, then throw your install into Dev Mode. WP Compiler watches your source folders for you, and recompiles your CSS and JS on any file change. WP Compiler supports both SCSS and LESS precompilers for CSS, to suit anyone’s preference.
When you’re ready to launch a new site, just turn off Dev Mode, and your styles and javascript will be compiled & minimized and comments & source maps will be removed. With Dev mode disabled, Compiler will stop watching source directories, so there is no effect on site performance, but you can still apply a quick change at any time, by clicking the compile button in the admin toolbar.
WP Compiler relies on <a href="http://leafo.github.io/scssphp/" rel="nofollow ugc">scssphp</a>, <a href="http://lessphp.typesettercms.com/" rel="nofollow ugc">lessphp</a>, and <a href="https://www.minifier.org/" rel="nofollow ugc">minify</a>. 
Specific issues with the underlying compilation libraries should be submitted to their respective developers.

WP Compiler

Harness the power of pre-processed CSS and minified JS in your theme or plugin, without any complicated installs or build tools.

WP CSS Generator vs WP Compiler