- See under .
- an intense dark reddish-brown color.
- a ferruginous earth used as a yellowish-brown pigment (raw sienna) or, after roasting in a furnace, as a reddish-brown pigment (burnt sienna).
- the color of such a pigment.
- a natural earth containing ferric oxide used as a yellowish-brown pigment when untreated (raw sienna) or a reddish-brown pigment when roasted (burnt sienna)
- the colour of this pigmentSee also
- a reddish-brown dye or pigment obtained by roasting raw sienna in a furnace
- a dark reddish-orange to reddish-brown colour
city in central Italy, probably from Senones, the name of a Gaulish people who settled there in ancient times. Related: Sienese. The brownish-ochre color (1760) is from Italian terra di Sienna “earth of Siena,” where the coloring material first was produced.