Wells template - change background color of mobile navigation

Hello, I need to change the background color of the navigation menu on the Wells Template. However the option won't show up on site styles. I would appreciate help on this matter asap please. Thank you!

2 hours ago, Romina_S said:

Hello, I need to change the background color of the navigation menu on the Wells Template. However the option won't show up on site styles. I would appreciate help on this matter asap please. Thank you!

Add to Home > Design > Custom CSS

@media screen and (max-width:640px) {
div#mobileNav {
    background: red;
}
}

Hi @tuanphan
Note that the mobile breakpoint in Wells is 800px.

@Romina_S
You'll find answer to your question (and related) in these threads: