.img-border-001:before {
    position: absolute;
    content: '';
    width: 55%;
    height: 45%;
    left: -10px;
    bottom: 22px;
    top: -10px;
    background: #509bd8;
    right: 0px !important;
    margin-bottom: 30px;
    transition:0.3s;
}
.img-border-001:hover:before {
     background: #4188c2;
    position: absolute;
    content: '';
    width: 60%;
    height: 48%;
    left: -10px;
}