The traditional color associated with St. Patrick's Day is green. This color is believed to represent the lush green landscape of Ireland, often referred to as the Emerald Isle. Additionally, green is linked to Irish nationalism and folklore. In Irish mythology, green is also associated with the leprechaun and signifies good luck and the spirit of spring. Many celebrate St. Patrick's Day by wearing green clothing and accessories, which is why parades and festivities around this holiday are often a sea of green.