How are you editing the code? Are you using a plugin or the customizer to make changes? It’s showing up inline and isn’t linked to a stylesheet. Here is the code that is showing up when hovered –
a,
.entry-title a:hover,
.image-section a:hover,
.image-section .featured-content .entry-title a:hover,
.site-footer a:hover {
color: #ba0000;
}
If you want to change the background only, then it would need to look like this –
a,
.entry-title a:hover,
.image-section a:hover,
.image-section .featured-content .entry-title a:hover,
.site-footer a:hover {
background-color: #ba0000;
}
Let me know if that helps.