sepia (n.)

"rich brown pigment," 1821, from Italian seppia "cuttlefish" (borrowed with that meaning in English by 1560s), from Latin sepia "cuttlefish," from Greek sēpia "cuttlefish," which some connect to sēpein "to make rotten" (see sepsis). Beekes finds this "semantically possible" (perhaps referring to the ink that smells as if it is rotten), but formally problematic and suggests it might be Pre-Greek.

The color was that of brown paint or ink prepared from the fluid secretions of the cuttlefish. Meaning "a sepia drawing" is recorded from 1863.

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Definitions of sepia from WordNet
sepia (n.)
a shade of brown with a tinge of red;
Synonyms: reddish brown / burnt sienna / Venetian red / mahogany
sepia (n.)
rich brown pigment prepared from the ink of cuttlefishes;
Sepia (n.)
type genus of the Sepiidae;
Synonyms: genus Sepia