GtkSymbolicColor is a boxed type that represents a symbolic color. It is the result of parsing a [color expression][gtkcssprovider-symbolic-colors]. To obtain the color represented by a GtkSymbolicColor, it has to be resolved with SymbolicColor.resolve, which replaces all symbolic color references by the colors they refer to (in a given context) and evaluates mix, shade and other expressions, resulting in a gdk.RGBA value.
Undocumented in source.