A ball gown is the formal garment most commonly associated with a quinceañera celebrant.
The dress is often elaborate, floor-length, and styled for a ceremonial entrance and formal photographs. Its appearance may resemble a prom or evening gown, with the celebrant choosing colors, fabric, neckline, and decorations according to personal taste and family custom.
The gown is not a fixed uniform. Some celebrants choose shorter dresses, modern evening wear, cultural clothing, or practical outfits suited to the event. The important feature is the formal presentation of the celebrant, not a required color or design. This is why claims that every quinceañera must wear a particular color are inaccurate.