raw sienna raw·sienna uncommon noun 1. a medium to dark tan color Synonymsyellowish brownraw siennabuffcaramelcaramel brown 2. a yellowish-brown pigment made from untreated sienna Synonymsraw sienna Related words Broader terms brownsienna Narrower terms snuff-color WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
