I’ve tried:

<strong>//Remove Underline
a {
  text-decoration: none;
}

//Add hover color effect
a:hover {
  color: #e05757;
}

I've also tried:

.entry-content a {
    color: #008488;
    border: none;
    box-shadow: none;
}

.entry-content a:hover {
    color: #008488;
}

I've also tried:

.entry-content a {
    box-shadow: none;
}

Please don’t link any support forum threads to me, because I guarantee I’ve already tried every link on there.

Let me know what else I can do.

*Looks*

That doesn’t appear to be a theme in this repo. Have you asked the author for support?