# Welcome to the Highcharts Gantt JS (gantt) Options Reference

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

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# plotOptions.series.dataLabels.style

Styles for the label. The default `color` setting is `"contrast"`, which is a pseudo color that Highcharts picks up and applies the maximum contrast to the underlying point item, for example the bar in a bar chart.

The `textOutline` is a pseudo property that applies an outline of the given width with the given color, which by default is the maximum contrast to the text. So a bright text color will result in a black text outline for maximum readability on a mixed background. In some cases, especially with grayscale text, the text outline doesn't work well, in which cases it can be disabled by setting it to `"none"`. When `useHTML` is true, the `textOutline` will not be picked up. In this, case, the same effect can be achieved through the `text-shadow` CSS property. As a complementary or alternative to the `textOutline`, a `dataLabels.backgroundColor` can be used. It provides a more calm impression and ensures readable text label, at the cost of a risk of overshadowing the underlying chart elements.

For some series types, where each point has an extent, like for example tree maps, the data label may overflow the point. There are two strategies for handling overflow. By default, the text will wrap to multiple lines. The other strategy is to set `style.textOverflow` to `ellipsis`, which will keep the text on one line plus it will break inside long words.