setTargetColor(color: PP.SolidColorBrush || String, inactiveOpacity: Number);
color. Color set for the specified tree map item.
inactiveOpacity. Opacity of tree map inactive item. Parameter values range between 0 and 1.
The setTargetColor method specifies fill color and opacity for specified tree map item.
The example of use is given in the page with description of the TreeMap.hoverItems method.