szliunian
Hi
Add this code in custom css section present in the template style option of JA Beauty template
.head-search .search .form-control:focus, .head-search .search .inputbox:focus, .head-search .search .search-query:focus, .head-search .form-search .form-control:focus, .head-search .form-search .inputbox:focus, .head-search .form-search .search-query:focus {
background-color: #000;
border-color: rgba(255,255,255,.2);
color: #fff;
}
Change the color code values as per needs.
Regards