.js_product_carousel_nav .slick-slide img {
    opacity: .85;
    -webkit-filter: grayscale(50);
    filter: grayscale(50);
    padding: .5rem;
    cursor: pointer;
    border: .125rem solid #f4f4f4;
    border-radius: .25rem;
    transition: .3s;
}

.js_product_carousel_nav .slick-current img {
    -webkit-filter: grayscale(0);
    filter: grayscale(0);
    opacity: 1;
    border-color: #219653;
}

.js_product_carousel_nav .slick-slide img:hover {
    border-color: #219653;
}