Hiding site description on home page

I have a publication logo that contains the title and site description, how do I hide the site description text from being shown as well? Is there a quick CSS thing I can do to hide it? Or should I edit the template? Or is there something I am missing?

It’s also white despite the background image being light gray. Is there an easy way to make the menu items dark?

Looks like I can do what I want with a site header code injection.