Internet Colors - Set of 1035

Dark Sienna Color 268 - #3C1414

Sienna is an earth pigment containing iron oxide and manganese oxide. In its natural state, it is yellow-brown and called raw sienna. When heated, it becomes a reddish brown and is called burnt sienna. It takes its name from Terra di Siena, or earth of Siena, named for the Italian city where it was produced during the Renaissance. The first recorded use of sienna as a colour name in English was in 1760.

Like the other earth colours, such as yellow ochre and umber, sienna is a clay containing iron oxide, called limonite, which in its natural state has a yellowish colour. In addition to iron oxide, natural or raw sienna also contains about five percent of manganese oxide, which makes it darker than ochre. When heated, the iron oxide is dehydrated and turns partially to haematite, which gives it a reddish-brown colour. Sienna is lighter in shade than raw umber, which is also clay with iron oxide. but which has a higher content of manganese (5 to 20 percent) which makes it greenish brown or dark brown. When heated, raw umber becomes burnt umber, a very dark brown