For example without the "hover" effect: function reconfigure(sender, store, columns, oldStore, oldColumns, eOpts) { var widgetColIndx = 1; columns[widgetColIndx].onWidgetAttach = function(column, widget, record) { widget.setStyle('border-color', 'green'); widget.setStyle('background-image', 'linear-gradient(lime, green)'); }; }