After I click on a post title, it changes color…How do I change this?!?!?

Hey, So im wondering as i described in the title how i would would go about changing this… I inspected it with firebug and i did change the CSS a bit, but still nothing…

My blog theme is Easel. It has a dark background so once i click on a certain post to get the URL for it, the post title turns black, making it nearly impossible to read. I will post an example below

https://www.bodyidolfitness.com/how-to-get-that-job-promotion-simply-by-living-a-healthy-active-lifestyle/

Would love assistance ASAP! Thanks in advanced!

You will probably need to start customising your theme’s CSS – possibly via a child theme or a custom CSS plugin. Try using Firefox with the Firebug add-on for this kind of CSS troubleshooting. Or use whatever developer tool is available in your web browser.

Thanks for your quick reply.

Unfortunately i have tried using firebug for Firefox.

This is the code it gave me:

h2.page-title, h2.post-title {
border-bottom: 1px solid #000000;
color: #000000;
margin-bottom: 3px;
text-shadow: 1px 1px 1px #555555;

}

I did try adjusting this but still no luck. I dont even know what i would look for as for a post title within its own URL