Dark complexion is a term used to describe a person's skin tone, which is usually a shade of brown. SWARTHY, SWART, OLIVE, and swarth are all synonyms for dark complexion, with each word having a slightly different meaning. SWARTHY is the most commonly used term, and it refers to a dark complexion that is caused by exposure to the sun. SWART is a more archaic term that means dark-skinned or tanned. OLIVE is a term used to describe a light brown complexion, while swarth is an old-fashioned term that means dark-brown.