.df-lightbox-wrapper .df-lightbox-close {
    color: white;
    background-color: rgba(255, 0, 0, 0.71);
    border-color: black;
}
.df-lightbox-wrapper .df-lightbox-close:hover {
    color: #444;
    background-color: rgba(255, 0, 0, 0.81);
    border-color: white;
}