What exatly is "olive" skin?

well im arab and im more of a light brown skin color and my cousin who is arab like me people tell him that he is "olive "complexion! does olive mean a naturally tan complexion or what? people say im light brown whats the differnce? they say italians are olive complexioned as welletc
Update: but they say im light brown and my cousin is olive! yet we are both arabs ! does this mean my cousin has a italian skin color or something cause they say italians are olive skin a lot! btw pure white skin looks ghastly and sortve sickly unhealthy looking
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