Black sweat has been mentioned by Bartholinus, who remarked that the secretion resembled ink; in other cases Galeazzi and Zacutus Lusitanus said the perspiration resembled sooty water.

Phosphorescent sweat has been recorded.

Paullini and the Ephemerides mention perspiration which was of a leek-green color, and Borellus has observed deep green perspiration.

Marcard mentions green perspiration of the feet, possibly due to stains from colored foot-gear.

The Ephemerides and Paullini speak of violet perspiration, and Bartholinus has described perspiration which in taste resembled wine.
Sir Benjamin Brodie has communicated the history of a case of a young girl of fifteen on whose face was a black secretion.