Change the color of the menu boxes for mobile devises

the site im working on is http://maquetaoxigeno.guordit.com.mx

i found the CSS to change the color of the barr

/* Enter Your Custom CSS Here */.btn-menu {
color: #000000;

but if i want to change the color of the boxes i can’t how can i do that,

for the color of text i know that can be changed form the color appereance theme menu.

Best regards.

Serch

Dear Serch,

Could you please try to apply the following CSS code through the Simple Custom CSS plugin or child theme’s style.css?

#mainnav-mobi{
  background-color: #ccc;
}
#mainnav-mobi ul li {
  border-color: #ddd;  
}  

Regards,
Kharis