soapbox/app/styles/components/theme-toggle.scss

.theme-toggle {
  .setting-toggle {

    &__label {
      margin-bottom: 0px;
      vertical-align: middle;
    }

    .react-toggle {
      vertical-align: middle;

      &-track-check,
      &-track-x {
        height: 15px;
        color: #fff;
      }
    }
  }
}