.item-holder .imgFooter {
    filter: url(data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'><filter id='grayscale'><feColorMatrix type='matrix'values='0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0'/></filter></svg>#grayscale);
    filter: gray;
    -webkit-filter: grayscale(100%);
}
    .item-holder .imgFooter:hover {
        filter: none;
        -webkit-filter: grayscale(0%);
    }