.bw-image {
    filter: grayscale(100%) contrast(65%) brightness(130%);
    transition: filter 1.5s ease;
}

.bw-image:hover {
    filter: grayscale(0%) contrast(100%) brightness(100%);
}
.panel.active .bw-image {
    filter: grayscale(0%) contrast(100%) brightness(100%);
}