Replace the color codes (#fffff and #000000) and add the css in theme options – design – custom css or in child theme style.css (if you installed it from theme pack).
Header mobile menu
.mobile_header { background-color: #ffffff; } .mobile_header i { color: #000000; }
Mobile Menu item
.snap-drawer { background-color: #282D33; } .user_mobile_menu_list, .mobilex-menu { background-color: #e38130; } .user_mobile_menu_list li a, .mobilex-menu li a { color: #FFFFFF; } .user_mobile_menu_list li, .mobilex-menu li { border-bottom: 1px solid #555; }