SMART datagrid v.1 > Classes > DefaultSortHandleRenderer
The background color of column filter handle of sorted state. 
Please refer to Colors Overview topic about the way of specifying color.
Defaults to "#808080".
    grid.setOperateOptions({
        sortHandleRenderer: {
            backgroundColor: "#ff0000",
            borderColor: "#880000"
            emptyBackgroundColor: null,
            emptyBorderColor: "#880000"
        }
    };