wagtail/client/scss/components/_indicator.scss

.privacy-indicator {
  &.public {
    .label-private {
      display: none;
    }
  }

  &.private {
    .label-public {
      display: none;
    }
  }
}

.indicator {
  font-size: 1em;
  margin-inline-end: 0;
  opacity: theme('opacity.70');

  .icon {
    border: 1px solid transparent;
    border-radius: 50%;
    font-size: 1.25em;
    padding: 2px;
    vertical-align: middle; // reset vertical-align set by icon.initial

    @media (forced-colors: active) {
      background-color: ButtonText;
    }
  }

  &.indicator--is-inverse {
    .icon {
      border-color: theme(
        'colors.surface-page'
      ); // ensure border is available for high contrast mode
      background-color: theme('colors.text-context');
      color: theme('colors.surface-page');
    }
  }
}