.wc-block-cart__submit-container {
    background: #000;
    color: #FFF;
}

.wc-block-cart__submit-container .wc-block-components-button__text {
    color: #FFF;
    font-weight: 600;
    text-decoration: none;
}

.wc-block-cart__submit-container a:hover {
    text-decoration: none;
}