The main color of the series. In line type series it applies to the line and the point markers unless otherwise specified. In bar type series it applies to the bars unless a color is specified per point. The default value is pulled from the options.colors array.

In styled mode, the color can be defined by the colorIndex option. Also, the series color can be set with the .highcharts-series, .highcharts-color-{n}, .highcharts-{type}-series or .highcharts-series-{n} class, or individual classes given by the className option.