Hi Jason
I didn't expect my code to remain in the editor when I closed the reopened it but surprisingly it was still there.
However another approach you could use is to set a custom class on the component e.g customLink
You then just add a hyperlink using the WYSIWYG editor (no need to view source)
Then in the custom CSS section add something like this:
.customLink a {
background-color: yellow;
}
Note this would make all links in that particular text component have a yellow background.