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umber (n.)

brown earthy pigment, 1560s, from French ombre (in terre d'ombre), or Italian ombra (in terra di ombra), both from Latin umbra "shade, shadow" (see umbrage) or else from Umbra, fem. of Umber "belonging to Umbria," region in central Italy from which the coloring matter first came (compare Sienna). Burnt umber, specially prepared and redder in color, is attested from c. 1650, distinguished from raw umber.

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Definitions of umber from WordNet
1
umber (n.)
an earth pigment;
umber (n.)
a medium brown to dark-brown color;
Synonyms: chocolate / coffee / deep brown / burnt umber
2
umber (adj.)
of the color of any of various natural brown earth pigments;
From wordnet.princeton.edu