.ka-flashing-image {
    border-width: 0px;
    border-color: #1b91c15e;
    border-radius: 10px;
    border-style: dotted;
}

    .ka-flashing-image:hover {
        border-width:3px;
        opacity: 1;
        -webkit-animation: flash 1.5s;
        animation: flash 1.5s;
    }

@-webkit-keyframes flash {
    0% {
        opacity: .4;
    }

    100% {
        opacity: 1;
    }
}

@keyframes flash {
    0% {
        opacity: .4;
    }

    100% {
        opacity: 1;
    }
}