.contact-map iframe{
    width: 100%;
    box-sizing: border-box;
    height: 250px;
    margin: 0px 0 20px;
}
.contact-map iframe{
    -webkit-filter: grayscale(100%);
    -moz-filter: grayscale(100%);
    -ms-filter: grayscale(100%);
    -o-filter: grayscale(100%);
    filter: grayscale(100%);
    border: 5px solid #E0E0E0;
}
.contact-map:hover iframe{
    -webkit-filter: grayscale(0);
    -moz-filter: grayscale(0);
    -ms-filter: grayscale(0);
    -o-filter: grayscale(0);
    filter: grayscale(0);
}