Yellow underwear is traditionally worn for luck at New Year in parts of Colombia.
The custom is one of several Latin American New Year practices that assign symbolic meanings to colors. Yellow is commonly associated with prosperity, happiness, abundance, or good fortune. Some people wear the color visibly, while others follow the custom through clothing worn underneath their ordinary outfit.
New Year traditions differ across Colombia, and this practice is not a legal or universal requirement. Families and communities may combine it with other customs, such as eating particular foods, making resolutions, or carrying symbolic objects at midnight.
Color symbolism can vary by country. Red is often linked with love in some celebrations, while yellow may represent money or optimism elsewhere. Therefore, the Colombian association should not be generalized to every Spanish-speaking country or every New Year tradition.