How can I change the 'border' color of the Nav in the Ready Template?

I am trying to use the Ready template but the lime green color it comes with doesn't seem to be editable for certain elements.

It is still visible as a faint horizontal line between the mobile footer and page. And also visible as a portrait line between nav and page.

Elsewhere I have managed to make changes (line block, desktop footer etc).

How can I edit these particular lines?

Can you share site url?

http://discoverandescape.com/new-page – pw: 1234

Thanks for your help! The faint line only appears to be visible above the mobile footer and to the right of the nav. Ideally I would change both to white lines that are the same width as the lines seen elsewhere.

I don't see right side line. To change footer line color, add to Home > Design > Custom CSS

div#mobileBar {
    border-color: red;
}

Great thanks so much! 

The other line is only visible to the right of the navigation menu (when clicked) and on desktop