Possible to remove underline from links?

Hello is it possible to remove the underlines from links in a text box? I'm using a heading style. I'd like to do a rollover/active color instead.

Thank you, that worked!

Is it possible to add a universal hover color or opacity change?

16 hours ago, sun_ said:

Thank you, that worked!

Is it possible to add a universal hover color or opacity change?

Use this code under

div.html-block a:hover {
	opacity: 0.2 !important;
}

Thank you this has been SO incredibly helpful! And it's so simple I feel like I'm actually learning myself. For color would I replace the opacity line with 'color: "html color code" !important;' ?

16 hours ago, sun_ said:

Thank you this has been SO incredibly helpful! And it's so simple I feel like I'm actually learning myself. For color would I replace the opacity line with 'color: "html color code" !important;' ?

Yes. The syntax will be

color: #f1f2f3 !important;

or 

color: violet !important;

Great, that worked! One more question- is it possible for the hover to affect the nav links in the header as well?

11 hours ago, sun_ said:

Great, that worked! One more question- is it possible for the hover to affect the nav links in the header as well?

Use this

div.header-nav-item>a:hover {
opacity: 0.2 !important;
}

Amazing, thank you!