In a traditional quinceañera, the honoree typically wears a formal ball gown.
The dress is one of the most recognizable visual features of the celebration. It is often chosen in a color selected by the honoree and family, and may include a full skirt, embellished fabric, embroidery, or matching accessories. Contemporary celebrations can also use less formal dresses or modern designs.
The gown helps distinguish the quinceañera from members of her court of honor, who commonly wear coordinated formal clothing. The honoree may also wear a tiara, carry flowers, and change from ceremonial footwear into high heels during the event.
There is no universally required color, style, or designer. The popular association with a large pastel gown reflects common practice and commercial imagery rather than a rule shared by every country or family.