Blue symbolizes good luck.

1. Traditionally, brides bring "some old, some new, some borrowed and some blue" when they get married. A few pieces of blue are to drive away all bad luck on the wedding day.

2. Ancient Roman philosophers would wear blue clothes under their coats to declare their wisdom. Blue is still the representative color of philosophy department in American university system.

People have always believed that wearing blue clothes can ward off evil spirits, because blue is the color of heaven, and evil forces are even more taboo about it. Blue can also protect people from evil.

People also agree that blue brings good luck. There is a children's song that goes like this: Touch blue and your wish will come true.

5. Britain's highest honor-Guardian Medal.

6. The expression "aristocratic descent" is used to describe people's aristocratic origins, originally from Spain.