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Venetian red is a light and warm (somewhat unsaturated) pigment that is a darker shade of red, derived from nearly pure ferric oxide (Fe2O3) of the hematite type. Modern versions are frequently made with synthetic red iron oxide.

Historically, Venetian red was a red earth color often used in Italian Renaissance paintings. It was also called sinopia because the best-quality pigment came from the port of Sinop in northern Turkey. [wiki]