Why “sienna” is a great word
SIENNA — [Adjective] Of a reddish-brown colour, originally derived from a clay pigment found near Siena, Italy. From Italian terra di Siena ("earth of Siena"), referring to the city of Siena in Tuscany, Italy, the source of the pigment. First attested in English by 1760 as 'terra-sienna'. Unlike ochre, which spans a spectrum from yellow to brown, or umber, which denotes a darker, cooler brown touched with manganese, sienna is the specific, warm hue of iron-oxide. It is the parched clay of a Tuscan field at dusk, the rusted hinge of an old gate, and the weathered leather of a well-traveled trunk—a colour that is not primal mud, but a particular, named dust, patiently oxidized by a single Italian sun.