thatposhgirl

This is a simple plugin that prepends any category names to the front of the 
title when viewed from the front page. It does this in the form:
[Category Name] Post Title
The current version prepends any categories that are associated with the post.

Category Title Prefix

Prepends the category name to the post title when viewed on the front page.

kinjaldalwadi

Free plugin which provides functionality to change color of post title for specific post without editing any code or file.
Plugin Functionality:
<ul>
<li>Allow to admin for change color of post title for specific post</li>
<li>It will change color of post title on post list and single post page</li>
<li>Do not need to edit any code </li>
<li>Gutenberg supported</li>
</ul>

Customize specific post title with color

Use to add custom color for specific post title.

Category Title Prefix vs Customize specific post title with color