This demo shows how default colors of the links in NavigationBar on a TreeMap chart. chart.navigationBar = new am4charts.NavigationBar(); chart.navigationBar.links.template.fill = am4core.color(“#691E06”); chart.navigationBar.activeLink.fill = am4core.color(“#8F250C”); chart.navigationBar = new am4charts.NavigationBar(); chart.navigationBar.links.template.fill = am4core.color(“#691E06”); chart.navigationBar.activeLink.fill = am4core.color(“#8F250C”); { // … “navigationBar”: { “links”: { “fill”: “#691E06” }, “activeLink”: { “fill”: “#8F250C” } } }