.topbar {
    background-color: #20374C !important;
}
.topbar-wrapper img[alt="Swagger UI"], .topbar-wrapper span {
    visibility: hidden;
}

.topbar-wrapper .link:after {
    content: 'Return to API User Guide';
    color: #fff;
    visibility: visible;
    display: block;
    position: absolute;
    padding: 15px;
}

.topbar-wrapper .link svg{
    visibility:hidden;
}