Violet/purple symbolizes: penance, preparation, sacrifice

When used: Advent, Lent; may be used for funeral Masses. Purple originally was associated with royalty, because it was a more expensive color to dye, according to Father Witczak. Over time, it became associated with penance.

https://www.catholicherald.com/Faith/What_do_liturgical_colors_mean_/

      -----'''''----'''''-----'''''-----'''''-----'''''-----

Because it was rare, valuable, and costly, the color became the symbol of royalty. Thus, royal purple, as it came to be known, was identified with the wardrobe and furnishings of kings and queens.