#amt-metabox-tabs ul.category-tabs li {
    background-color: white;
    padding: 5px 0px;
}

#amt-metabox-tabs ul.category-tabs li a {
    padding: 5px 20px;
}

#amt-metabox-tabs ul li.ui-state-active {
    background-color: #777;
}

#amt-metabox-tabs ul li.ui-state-active a {
    color: white;
}