Welcome to the Highcharts Stock JS (highstock) Options Reference

These pages outline the chart configuration options, and the methods and properties of Highcharts objects.

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Fill opacity for the area. When you set an explicit fillColor, the fillOpacity is not applied. Instead, you should define the opacity in the fillColor with an rgba color definition. The fillOpacity setting, also the default setting, overrides the alpha component of the color setting.

In styled mode, the fill opacity can be set with the .highcharts-area class name.