I am using areaChart with two series, one draws positive (blue) and another for negative (red) colors. I want the second series should override first series. The alpha for the colors are set to 0.2. The problem is that the second series doesn't completely override the first series as it shows different color (mixed of positive and negative colors).
If the alpha is set to 1, then all looking good. But i want the alpha is set to 0.2.