Change menu colors

Add the following to your CSS, with the color of your choice.

.secondary-menu-bs .container {background: blue;}
.secondary-menu-bs .current_page_item {background:yellow;} //highlight

Thank you really much!!!! ??
Let say i have a dropdown menu: MainPage->{Subpage 1, Subpage 2,…}; i would like to highlight MainPage when the current page is Subpage. Is it possible?

Do not edit the theme itself. First create a child theme for your changes. Or install a custom CSS plugin.

i’ve solved the problem… my fault!!!
all i had to do was to create a menu, and apply it to the secondary menu panel. In this way, the solution posted here works fine.
Thank you!