Background Color — KivyMD documentation The background color of the widget (Widget) that will be inherited from the BackgroundColorBehavior class. ... md_bg_color is an ReferenceListProperty and defaults to r, g, b, a. class kivymd.uix.behaviors.backgroundcolorbehavior ... specific_secondary_text_color`is an:class:`~kivy.properties.ListProperty and defaults to [0, 0, 0, 0 ...