#slider-round {
    height: 10px;
}

#slider-round .noUi-connect {
    background: #c0392b;
}

#slider-round .noUi-handle {
    height: 18px;
    width: 18px;
    top: -5px;
    right: -9px; /* half the width */
    border-radius: 9px;
}