[Solved]-How do I change the opacity of a series in Highcharts?-Highcharts

From this discussion, you can use something like this to adjust the color dynamically:

serie.color = "#FF00FF";
serie.graph.attr({ 
    stroke: '#FF00FF'
});
$.each(serie.data, function(i, point) {
    point.graphic.attr({
        fill: '#FF00FF'
    });
});
serie.redraw();