The page template I’m working with is in one folder called “page templates”, then the image i’m trying to pull from is in the img folder in the same root as page templates, if that makes sense.
Do a search in your browser on that css file EDIT>FIND >jumbotron and you will find the styles I posted above.
I see that it is a WordPress site and it uses Bootstrap, neither of which I work with.
I know Bootstrap has certain rules you have to follow and the same with WP.
Not sure, but you should be able to set up your own css file that overrides the default styling of your template/theme.