See under sienna (def 1).
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 reddish-brown dye or pigment obtained by roasting raw sienna in a furnace
a dark reddish-orange to reddish-brown colour
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 pigment See also burnt sienna


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