# 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.colorAxis

When using dual or multiple color axes, this number defines which colorAxis the particular series is connected to. It refers to either the {@link #colorAxis.id|axis id} or the index of the axis in the colorAxis array, with 0 being the first. Set this option to false to prevent a series from connecting to the default color axis.

Since v7.2.0 the option can also be an axis id or an axis index instead of a boolean flag.