The Protonotary Apostolic is conferred predominantly on priests who serve on seven specific positions in the Roman Curia. These are referred to as Protonotaries of Number. Aside from these seven, the honor of Protonotary Apostolic can also be conferred on priests outside of the Roman Curia. These are called Protonotaries Apostolic Supernumerary. A Protonotary Apostolic wears a black cassock with red buttons and piping along with a fuchsia sash. A fuchsia cape can also be worn on special occasions.
The second grade of monsignor is the Prelate of Honor to His Holiness. This grade was historically associated with the chamberlain of the papal court and today can also be conferred to priests outside of the papal court. A Prelate of Honor to His Holiness, during liturgies, wears a bishop’s choir cassock, which is fuchsia in color with red buttons, piping and cuffs, and a fuchsia sash. Prelates of Honor to His Holiness may also wear a bishop’s black cassock, which also has red buttons, piping and a fuchsia sash.
The third grade of monsignor is the Chaplain to His Holiness. This honor can be conferred to priests inside or outside of the Roman Curia. A Chaplain to His Holiness wears a black cassock with fuchsia piping and buttons along with a fuchsia sash.