Configures the appearance adopted by the series when a user points to it.
Configures the appearance adopted by the series border (in area-like series) or the series point border (in bar-like and bubble series) when a user points to the series.
Specifies the color of the series in the hovered state.
This option supports the following colors:
- Hexadecimal colors
- RGB colors
- RGBA colors
- Predefined/cross-browser color names
- Predefined SVG colors