.dropdown-menu{
    background: #999999;
    border:0;
    top:80%;
    border-radius:0px 0px 5px 5px;
}
.dropdown-item:hover{
    background:#fff;
    color:#999999;
}
.dropdown-menu a{
    color:#fff;
} 
.navbar .nav-item .nav-link:hover{
    color:#999 !important;
    background-color: #fff; 
}