CheckBox {
    text: "Check Box"
    style: CheckBoxStyle {
        indicator: Rectangle {
                implicitWidth: 16
                implicitHeight: 16
                radius: 3
                border.color: control.activeFocus ? "darkblue" : "gray"
                border.width: 1
                Rectangle {
                    visible: control.checked
                    color: "#555"
                    border.color: "#333"
                    radius: 1
                    anchors.margins: 4
                    anchors.fill: parent
                }
        }
    }
}