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What (who) is burnt sienna - definition
![The clay soil of Tuscany (here near [[Monteriggioni]]) is rich in limonite, or hydrated iron oxide, the main component of sienna pigment.](https://commons.wikimedia.org/wiki/Special:FilePath/Monteriggioni0001.jpg?width=200 "The clay soil of Tuscany (here near [[Monteriggioni]]) is rich in limonite, or hydrated iron oxide, the main component of sienna pigment.")
![[[Limonite]], a clay containing iron oxide, which gives sienna pigment its color.](https://commons.wikimedia.org/wiki/Special:FilePath/LimoniteUSGOV.jpg?width=200 "[[Limonite]], a clay containing iron oxide, which gives sienna pigment its color.")
![[[Haematite]]. When roasted, limonite is converted partially to [[haematite]] and its colors turns more reddish.](https://commons.wikimedia.org/wiki/Special:FilePath/Hematite.jpg?width=200 "[[Haematite]]. When roasted, limonite is converted partially to [[haematite]] and its colors turns more reddish.")
![[[Giorgio Vasari]] (1511–1574) used earth colors, including ochre and sienna, in his frescos such this in the Hall of the Five Hundred at the [[Palazzo Vecchio]] in Florence.Web exhibits, Pigments through the Ages. In his writings Vasari referred to sienna as ''terra rossa''.Giorgio Vasari, Lives of the Most Eminent Painters, Sculptors and Architects. (Google Books).](https://commons.wikimedia.org/wiki/Special:FilePath/Giorgio Vasari - The battle of Marciano in Val di Chiana - Google Art Project.jpg?width=200 "[[Giorgio Vasari]] (1511–1574) used earth colors, including ochre and sienna, in his frescos such this in the Hall of the Five Hundred at the [[Palazzo Vecchio]] in Florence.Web exhibits, Pigments through the Ages. In his writings Vasari referred to sienna as ''terra rossa''.Giorgio Vasari, Lives of the Most Eminent Painters, Sculptors and Architects. (Google Books).")
![[[Rembrandt]] van Rijn used all the earth pigments (sienna, ochre, and umber) to create his rich and complex browns.](https://commons.wikimedia.org/wiki/Special:FilePath/Rembrandt Self-portrait (Kenwood).jpg?width=200 "[[Rembrandt]] van Rijn used all the earth pigments (sienna, ochre, and umber) to create his rich and complex browns.")
Wikipedia
Sienna (from Italian: terra di Siena, meaning "Siena earth") is an earth pigment containing iron oxide and manganese oxide. In its natural state, it is yellowish brown and is called raw sienna. When heated, it becomes a reddish brown and is called burnt sienna. It takes its name from the city-state of Siena, where it was produced during the Renaissance. Along with ochre and umber, it was one of the first pigments to be used by humans, and is found in many cave paintings. Since the Renaissance, it has been one of the brown pigments most widely used by artists.
The first recorded use of sienna as a color name in English was in 1760.
The normalized color coordinates for sienna are identical to kobe, first recorded as a color name in English in 1924.
