.select2-selection {
    overflow: hidden;
    color: white !important;
}

.select2-selection__rendered[title] {
    padding-left: .75rem;
    background-color: #343a40;
    color: white !important;
}

.select2-container--bootstrap4 .select2-selection--single .select2-selection__arrow b {
    position: absolute;
    top: 60%;
    left: 50%;
    width: 0;
    height: 0;
    margin-top: -2px;
    margin-left: -4px;
    border-color: #fff transparent transparent transparent !important;
    border-style: solid;
    border-width: 5px 4px 0;
}