1. Steady and introverted: People who choose blue underwear often have a calm personality, do not easily express their emotions, and like to maintain inner peace and deep thinking.
2. Rational calmness: Blue symbolizes calmness and rationality. These people tend to use logic and rationality to analyze and solve problems, and are not easily impulsive.
3. Pursuing harmony: They usually focus on harmonious interpersonal relationships, are good at listening to others' opinions, tend to avoid conflicts, and seek consensus and balance.