the name of the symbolic color to modify
the color to assign (does not need to be allocated), or %NULL to undo the effect of previous calls to gtk_widget_override_symbolic_color()
Deprecated: This function is not useful in the context of CSS-based rendering. If you wish to change the color used to render symbolic icons you should use a custom CSS style, through an application-specific #GtkStyleProvider and a CSS style class.
3.0
Sets a symbolic color for a widget.
All other style values are left untouched. See gtk_widget_override_color() for overriding the foreground or background color.