From Longman Dictionary of Contemporary Englishsiennasi‧en‧na /siˈenə/ noun [uncountable] CCa yellowish-brown colour
Examples from the Corpus
sienna• White acrylic mixed with cadmium orange, yellow ochre or burnt sienna allows Martin to overlap and cross-hatch.• I then apply a very watery burnt sienna to the parts to maintain some warmth amongst the shadows.• Burnt sienna, with its rich, luminous red, makes an ideal colour for adding warmth to natural brick.• A burnt umber man in a raw sienna compartment.• Black lighting is suggested by painting the shadows in a mixture of raw sienna and grey.Origin sienna (1700-1800) Italian terra di Siena “Siena earth”, from Siena town in Italy 