portainer/app/extensions/oauth/components/oauth-providers-selector/oauth-providers-selector.html

<div class="col-sm-12 form-section-title">
  Provider
</div>

<div class="form-group"></div>
<div class="form-group" style="margin-bottom: 0;">
  <div class="boxselector_wrapper">
    <div ng-click="$ctrl.onSelect($ctrl.provider, true)">
      <input type="radio" id="oauth_provider_microsoft" ng-model="$ctrl.provider" ng-value="$ctrl.providers[0]" />
      <label for="oauth_provider_microsoft">
        <div class="boxselector_header">
          <i class="fab fa-microsoft" aria-hidden="true" style="margin-right: 2px;"></i>
          Microsoft
        </div>
        <p>Microsoft OAuth provider</p>
      </label>
    </div>
    <div ng-click="$ctrl.onSelect($ctrl.provider, true)">
      <input type="radio" id="oauth_provider_google" ng-model="$ctrl.provider" ng-value="$ctrl.providers[1]" />
      <label for="oauth_provider_google">
        <div class="boxselector_header">
          <i class="fab fa-google" aria-hidden="true" style="margin-right: 2px;"></i>
          Google
        </div>
        <p>Google OAuth provider</p>
      </label>
    </div>
    <div ng-click="$ctrl.onSelect($ctrl.provider, true)">
      <input type="radio" id="oauth_provider_github" ng-model="$ctrl.provider" ng-value="$ctrl.providers[2]" />
      <label for="oauth_provider_github">
        <div class="boxselector_header">
          <i class="fab fa-github" aria-hidden="true" style="margin-right: 2px;"></i>
          Github
        </div>
        <p>Github OAuth provider</p>
      </label>
    </div>
    <div ng-click="$ctrl.onSelect($ctrl.provider, true)">
      <input type="radio" id="oauth_provider_custom" ng-model="$ctrl.provider" ng-value="$ctrl.providers[3]" />
      <label for="oauth_provider_custom">
        <div class="boxselector_header">
          <i class="fa fa-user-check" aria-hidden="true" style="margin-right: 2px;"></i>
          Custom
        </div>
        <p>Custom OAuth provider</p>
      </label>
    </div>
  </div>
</div>