Steps to Reproduce

Run below zul file

 

<window>
  <charts id="chart" type="bubble"/>
  <zscript><![CDATA[
    import org.zkoss.chart.Charts;
    import org.zkoss.chart.Point;
    import org.zkoss.chart.Series;
    final Series series = new Series();
    final Point point = new Point(0, 1, 2);
    point.setColor("#123456");
    series.addPoint(point);
    chart.addSeries(series);
  ]]></zscript>
</window>

Current Result

No point was shown.

Expected Result

Should show a blue bubble

Debug Information

{{The point would be converted to 

{"x":0,"low":1,"high":2,"color":"#123456"}

}}
after color was specified. It should be

{"x":0,"y":1,"z":2,"color":"#123456"}