where is the html code for adjusting my blog post title

Where is the html code for adjusting my blog post title?

New to coding, working on https://www.mygoodcounsel.com/blog/
I am trying to get the blog post title to match the color of the rest of the site. I was able to eliminate the drop shadow by adjusting

header h1 {
font-size: 4em;
letter-spacing: -0.07em;
text-shadow: 3px 3px 2px rgba(0,0,0,0.2);

But when I add in a color specification it doesn’t take… Thank you in advance for any contribution.