Sets the background color to use for a widget. All other style values are left untouched. See gtk_widget_override_color().
the state for which to set the background color
the color to assign, or NULL to undo the effect of previous calls to gtk_widget_override_background_color(). [allow-none] Since 3.0
See Implementation
Sets the background color to use for a widget. All other style values are left untouched. See gtk_widget_override_color().