.nav-tabs .nav-item.show .nav-link, .nav-tabs .nav-link.active {

    color: orangered;

    background-color: #fff;

    border-color: none;

}

​

.nav-tabs {

    border-bottom: none;

}

​

.nav-tabs .nav-link:hover{

    color: color:gray

}

.nav-link.active {

  color: red !important;

  background-color: yellow !important;

}