Interview. Blue represents tranquility, and blue means you are steady and conservative, which is suitable for weddings, business, daily life, meetings and so on. However, blue also reminds the interviewer to "think twice before you act", so it is not suitable for an interview. Suit, also known as suit, generally refers to western formal suit, and modern suit refers to men's three-piece suit. In a broad sense, a suit refers to foreign clothes, including the whole western clothing system.