How to set a css class for a selected node in a tree?

I am using a Dijit Tree, and I need to change the CSS style for a node when selected (focus). Lets imagine a node is black when "deselected", and it becames red when "selected" and viceversa.

What should I change in my code?

var tree = new Tree({
                model: this._model,
                showRoot: true,
                autoExpand: true,
                persist: false,
                getLabel: function (item) {
                    return item.name;
                },
                onClick: function (item, node, event) {
                    businessLogic.goToView(item.id);
                }

If you want to update the css for the selected node, you should just override the css like this: .claro .dijitTreeRowSelected { color: red } Here is a simple jsfiddle which will make the selected label red, and the hovered one green: http://jsfiddle.net/edchat/dox42qye/15/