The zodiac sign Sagittarius is traditionally associated with the color purple. Purple is often considered a color that represents wisdom, spirituality, and a sense of adventure, which aligns with the characteristics commonly attributed to Sagittarius individuals. Sagittarius is a Fire sign ruled by Jupiter, and the association with purple reflects the expansive, optimistic, and philosophical nature of the sign. Purple is often associated with higher learning, exploration, and a quest for knowledge, resonating with Sagittarius' adventurous spirit and intellectual pursuits.