Charts Legend

The legend tells users which color belongs to which series or slice.

Adjust placement and mark size with legend props, or add a color-bar legend when values map to a continuous scale (see charts-styling and heatmap previews).

• Multi-series cartesian charts where color alone is ambiguous.
• Dashboards where users toggle series visibility to reduce clutter.
• Heatmaps or styled axes that need a color-scale key (continuous legend).

• Set legend=LegendConfig::default() on any *Chart or ChartContainer.
• Wire on_legend_click when the parent must react to visibility toggles.
• Pair with tooltip so hidden series do not leave unexplained colors on the plot.