How do I change the menu bar on home page?

There are 3 menu bars in the home page, how do I change the color and/or background of these?

 

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

#menu li a{
color:blue;
}
#menu li.current-menu-item a, #menu li.current-menu-parent a, #menu li.current_page_parent a, #menu li a.selected, #menu li a:hover, #menu li.current_page_item a{
color:red;
}