put class="form-control" type="text" ng-model="serie.label" placeholder="Label">
        </div>
        <div class="input-group">
            <input type="text" class="form-control" ng-model="serie.color" placeholder="Color" size="8">
            <span class="input-group-btn">
                <button colorpicker colorpicker-close-on-select class="btn btn-default" ng-model="serie.color"
                    type="button">
                    <i class="fa fa-stop" style="color: {{serie.color}};"
              