hr {
    margin: 0 auto;
    width: 100%;
    border: 0;
    height: 1px;
    background-image: linear-gradient(to right, rgba(19, 255, 0, 1), rgba(225, 0, 226, 1), rgba(19, 255, 0, 1));
    background-image: -webkit-linear-gradient(to right, rgba(19, 255, 0, 1), rgba(225, 0, 226, 1), rgba(19, 255, 0, 1));
}