.contactholder {
    display: flex;
    align-items: center;
    justify-content: center;
}

.contactholder a .contactlink {
    margin-right: 15px;
}

.contactholder a:last-child .contactlink {
    margin-right: 0px;
}

.contactlink img {
    width: 40px;
    filter: invert();
}