 demo" value="#ff0000"/>
                <span class="input-group-btn">
                  <button class="btn btn-default" type="button">Button</button>
                </span>
              </div>
              <span class="help-block">
                Input group example with addon.
              </span>
            </div>
          </div>
        </div>
        <div class="row">
          <div class="col-lg-4 col-sm-4 col-12">
            <div class="form-group">
              <label for="letter-case">Swa