def __init__(self, label_time):
        self.label_time = label_time

        style_context = self.label_time.get_style_context()
        self.color_override = Gtk.CssProvider()
        style_context.add_provider(self.color_override, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION + 1)

        self.label_color_default = self.load_color_from_css(style_context)
        label_color_ett_reached = self.load_color_from_css(style_context, "ett-reached")
        label_color_ett_info = self.load_color_from_css(style_context, "ett-info")
        label_color_ett_warn = self.load_color_from_css(style_context, "ett-warn")

        self.color_map = [
            ( 300, self.label_color_default),
            (   0, label_color_ett_reached),
            (-150, label_color_ett_info),
            (-300, label_color_ett_warn)
        ]