How do I style headings on each post differently

post_class()
https://codex.www.ads-software.com/Function_Reference/post_class

or basic principle to give a post dependant css class to the post title;for example:

<h3 class="post-title post-title-<?php the_ID(); ?>"><?php the_title?(); ?></h3>

Specifically using alchymyth’s example the css required to style an individual post title (style.css in your theme):

/* Different header for pages and posts if post_class() is being used */
.post h1, .post h2, .post h3 { /* whatever your actual h# tag(s) are */
   font-family: Helvetica;
   color: #111;
}
.page h1, .page h2, .page h3 {
   font-family: Georgia;
   color: #111
}

/* Individual post title by id like in alchymyth's example */
.post-title-23 {
    font-family: Tahoma;
    color: #222;
}

If the post_class is being used then the containing element for each post/page in a loop or on a single/page template will output a variety of useful css selectors you use to customize invidual elements more than you need.

Hope that helps.

Thank you so very much. I do believe this is what I was looking for.

If you would please mark this thread as “resolved” it would be appreciated. Helps everyone keep better track of whose issues are still outstanding. Thanks!