The color most commonly associated with royalty is purple. Historically, purple dye was rare and expensive to produce, often derived from the mucus of certain sea snails, making it a luxury reserved for the wealthy and powerful. This association of purple with nobility can be traced back to ancient civilizations, such as the Phoenicians and Romans, where emperors and kings wore purple garments as symbols of their status. Over time, purple has maintained its regal connotation and remains a popular color in royal insignias and ceremonial attire today, embodying qualities of luxury, power, and elegance.