Every color comes entirely from forest leaves and plants, not food dye — the same handful of ingredients has colored this dish for generations before synthetic dyes ever existed.
Glutinous rice is soaked separately in dyes drawn from local leaves and plants — typically producing purple, red, yellow, green, and white — then steamed and served together as one dish of colored sticky rice, often shaped or layered for festivals and markets. Tày and Nùng villages across the northern highlands make it for New Year and harvest celebrations, and it's sold at highland markets year-round.