I understand Ford’s name for it. Light Ivy yellow is pale green in color. W code yellow is pale yellow in color, not to be confused with the competition yellow you would see on an Eliminator.
My former R Code convertible was built 11/15/68 in W code yellow w/black leather. 1 of 1 when sorted for bodystyle, powertrain & color combo. More info & pics in the thread linked below.
My '67 is Nordic Blue w/blue interior. Built 5/23/67