How do you change the border color of menu items?

I got the popup menus to display a black background color, but the borders of the menu items still remain white (or something close to white)

I have tried some custom css but can’t seem to find the right class to modify, even with firebug.

Your help is appreciated, thank you!

screenshot

The white part above.

Add this code to Theme Options - Other - Custom CSS

#main-nav ul li ul li {
    border: none;
}

it will get rid of borders completely. But you can feel free to modify this code to add different border-color or make other changes.

Let me know if this helps.

That worked! Thank you!