gns3-web-ui/src/styles.css

img.logo-header {
  width: 50px;
}

a.table-link {
  color: #0097a7;
}

.snackabar-success {
  background:#0097a7!important;
  color: white!important;
}

.snackbar-error {
  background: #B00020!important;
  color: white!important;
}

app-root {
  width: 100%;
}