btn-icon-only .fa-check:hover {
    color: green;
}

.fa-times:hover {
    color: red;
}

.fa-spin-hover:hover {
    -webkit-animation: spin 2s infinite linear;
    -moz-animation: spin 2s infinite linear;
    -o-animation: spin 2s infinite linear;
    animation: spin 2s infinite linear;
}

.fa-spin-reverse {
    -webkit-animation: fa-spin 2s infinite linear reverse;
    animation: fa-spin 2s infinite linear reverse
}

a:hover.btn-icon-only.hover-green {
    color: green;
    background: lightgreen;
    border-color: green;
}

a:hover.btn-icon-only.hover-red {
    color: red;
    background: lightcoral;
    border-color: red;
}