.hvr-fill-black:before, .hvr-bg-black:hover, .hvr-bg-black:focus, .hvr-bg-black:active {
    background: #333333 !important;
}

.hvr-fill-blue:before, .hvr-bg-blue:hover, .hvr-bg-blue:focus, .hvr-bg-blue:active {
    background: #2098d1 !important;
}

.hvr-fill-white:before, .hvr-bg-white:hover, .hvr-bg-white:focus, .hvr-bg-white:active {
    background: #FFFFFF !important;
}

.hvr-fill-gray:before, .hvr-bg-gray:hover, .hvr-bg-gray:focus, .hvr-bg-gray:active {
    background: #CCCCCC !important;
}