White (all day) or Violet (at Rogation procession and Mass only)
In the Mass of Sunday: Commemoration only of the Greater Litanies
In the Office: Commemoration only of St. Mark, Evangelist
The Greater Litanies (excerpted from Rubricae generales):
81. Of the greater litanies there is nothing in the office, but only in the Mass. […]
82. According to conditions and customs varying from one church to another and from one place to another … a procession is held on this day, in which the Litany of Saints is said with its accompanying prayers. The petitions of the litany are not doubled.
83. If a procession cannot be held, … special supplications [may be said], which shall include the Litany of the Saints and the other prayers customarily said in procession.
84. All those who are bound to the recitation of the divine office, but do not take part in the procession or in the other special supplications mentioned in the preceding section, must say the Litany of the Saints with its prayers, in Latin, on this day.
85. If, according to the custom of the place, the Litany of the Saints with its prayers is said in the vernacular tongue along with the faithful, in procession or as a part of the other special supplications, those who are bound to the recitation of the divine office and who actually take part in these supplications do not have to repeat these prayers in Latin.
86. The rogation Mass is regularly to be said after the procession…. It is fitting, however, that the rogation Mass be said even after the special supplications which take the place of the procession, even if these services are held in the evening. [It is a II class votive Mass, per RG 346.]
Apart from procession/supplications: Mass of the Sunday (White), Gloria, commemoration of the Rogations, Credo, preface of Easter
Following procession/supplications: Mass of the Rogations Exaudivit de templo, listed in the Missal before the Vigil of the Ascension (Violet), prayers at the foot of the altar omitted, no Gloria*, commemoration of Sunday, Credo*, preface of Easter
*The Gloria is not said because the Mass is in violet vestments, but the Credo is said because it is Sunday
Office of Sunday; the Greater Litanies are not commemorated in the Divine Office
Matins: Invitatorium and Hymn in Tempore Paschatis, antiphon Alleluia and psalms of Sunday, 3 lessons proper, Te Deum
Lauds: Antiphon Alleluia and psalms of Sunday (first schema); remainder proper; commemoration of St. Mark
Hours: Antiphon Alleluia and psalms of Sunday; remainder proper
Vespers: Antiphon Alleluia and psalms of Sunday; remainder proper
Compline: Of Sunday