# Welcome to the Highcharts Maps JS (highmaps) Options Reference

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

Feel free to search this API through the search bar or the navigation tree in the sidebar.

# series.pie.borderColor

The color of the border surrounding each slice. When `null`, the border takes the same color as the slice fill. This can be used together with a `borderWidth` to fill drawing gaps created by antialiasing artifacts in border-less pies.

In styled mode, the border stroke is given in the `.highcharts-point` class.