A beige flag is a dating term to identify odd behaviors in partners when in a relationship. A beige flag is an odd bit of information or a habit in a person that’s makes people take notice of it as its unusual. Beige flags can also be a personality trait or habit in a person that others find odd.  Beige flags are in-between red flags and green flags which are also dating terms to identify negative and positive traits in people. Hence beige flags fall in between these two terms meaning something that's neither good nor bad but simply odd or boring.