chromium/ash/webui/common/resources/cellular_setup/final_page.html

<style>
  #illustration {
    background-image: url(chrome://resources/ash/common/cellular_setup/final_page_success.svg);
    background-position: center center;
    background-repeat: no-repeat;
    background-size: contain;
  }

  #illustration.error {
      background-image: url(chrome://resources/ash/common/cellular_setup/error.svg);
      background-size: contain;
  }

  @media(prefers-color-scheme: dark) {
    #illustration {
      background-image: url(chrome://resources/ash/common/cellular_setup/final_page_success_dark.svg);
    }

    #illustration.error {
        background-image: url(chrome://resources/ash/common/cellular_setup/error_dark.svg);
    }
  }

  #illustrationJelly {
    height: 242px;
    width: 242px;
    align-self: center;
  }

  :host-context(body.jelly-enabled) #illustration {
    display: none;
  }

  :host-context(body:not(.jelly-enabled)) #illustrationJelly {
    display: none;
  }
</style>
<base-page title="[[getTitle_(showError)]]"
    message="[[getMessage_(showError)]]">
  <div id="illustration" class$="[[getPageBodyClass_(showError)]]"
      slot="page-body">
  </div>
  <iron-icon id="illustrationJelly"
      icon="[[getJellyIllustrationName_(showError)]]"
      slot="page-body">
  </iron-icon>
</base-page>