# JS API Reference

# Welcome to the Highcharts JS 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.dumbbell.negativeColor

The color for the parts of the graph or points that are below the threshold. Note that `zones` takes precedence over the negative color. Using `negativeColor` is equivalent to applying a zone with value of 0.