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I have the same problem but the solution suggested here does not work. If i set the renderer after applying theme, irrespective of the color i choose the color of lines in all the graphs in CombinedDomainXYPlot is red only. All I need is the same color black for all the plots in the combined plot. B...

convergencePlot = new CombinedDomainXYPlot(objPlot.getDomainAxis()); convergencePlot.setGap(12D); convergencePlot.setBackgroundPaint(Color.white); convergencePlot.setDomainGridlinePaint(Color.gray); convergencePlot.setRangeGridlinePaint(Color.gray); convergencePlot.setDomainGridlinesVisible(true); ...