Appcelerator ListView set a background selected colour

index.js

function toggleCheck(_event) {

    var items = _event.section.getItems();
    for (var i = 0; i < items.length; i++) {

        var resetItem = _event.section.getItemAt(i);
        resetItem.properties.backgroundColor = Alloy.Globals.Device.brandColorBg;
        _event.section.updateItemAt(i, resetItem);

    };

    var item = _event.section.getItemAt(_event.itemIndex);
    item.properties.backgroundColor = "#696969";
    _event.section.updateItemAt(_event.itemIndex, item);
    results[($.quizContainer.getCurrentPage())] = item.answer.val;

}

var myTemplate = {
    events: {
        click: toggleCheck
    },
    childTemplates: [{ // Title
        type: 'Ti.UI.View', // Use a label for the title
        properties: { // Sets the label properties
            touchEnabled: false,
            top: 0,
            left: 0,
            width: Ti.UI.FILL,
            height: (OS_ANDROID) ? 40 : Ti.UI.FILL
        }
    }, { // Title
        type: 'Ti.UI.Label', // Use a label for the title
        bindId: 'answer', // Maps to a custom info property of the item data
        properties: { // Sets the label properties
            touchEnabled: false,
            left: 10,
            width: Ti.UI.FILL,
            textAlign: Titanium.UI.TEXT_ALIGNMENT_LEFT,
            color: Alloy.Globals.Device.brandColorText,
            font: {
                fontSize: 16,
                fontFamily: Alloy.Globals.Device.textFontMedium
            }
        }
    }]
};

var listView = Ti.UI.createListView({
    templates: {
        'template': myTemplate
    },
    defaultItemTemplate: 'template',
    separatorColor: '#fff',
    separatorStyle: Ti.UI.TABLE_VIEW_SEPARATOR_STYLE_SINGLE_LINE,
    top: 10,
    left: 20,
    right: 20
});

if (OS_IOS) {

    listView.setRowSeparatorInsets({
        left: 0,
        right: 0
    });

}

var sections = [];

var answerSection = Ti.UI.createListSection();
var answersDataSet = [];

for (var a = 0; a < data[i].answers.length; a++) {
    answersDataSet.push({
        properties: {
            backgroundColor: Alloy.Globals.Device.brandColorBg,
            accessoryType: Ti.UI.LIST_ACCESSORY_TYPE_NONE,
        },
        answer: {
            text: data[i].answers[a].title,
            val: data[i].answers[a].val
        }
    });
}

answerSection.setItems(answersDataSet);
sections.push(answerSection);

listView.setSections(sections);

card.add(listView);