.synved-social-grey img {
filter: url('filters.svg#grayscale'); /* Firefox 3.5+ */
-ms-filter: gray; /* IE9 */
-webkit-filter: grayscale(1);
padding:0.1px;
}
.synved-social-grey:hover img {
filter: none;
-ms-filter: none;
-webkit-filter: grayscale(0);
}

.synved-social-fade img {
opacity:0.65;
}
.synved-social-fade:hover img {
opacity:1;
}