.grouped-product-label {
    border: 1px solid #00a0e0;
    padding: 5px;
    margin: 2px;
    display: inline-block;
    color:#000!important;
}

.grouped-product-label:hover {
    color:#00a0e0!important;
}

@media (max-width: 576px) {
    .grouped-product-label {
        padding: 0px 3px;
        font-size: 13px;
    }
}