.container img {
        width: 100%;
        display: block;
        -webkit-filter: grayscale(1);
        filter: grayscale(1);
        transition: all 100ms ease-out;
    }

        .container img:hover {
            transform: scale(1.04);
            -webkit-filter: grayscale(0);
            filter: grayscale(0);
        }