Heritage
Teal — the blue-green range — is named after the Eurasian teal duck, whose wing patches sit at exactly this hue. Egyptian blue and Egyptian green, both made from copper-calcium silicate around 2,500 BCE, sit in this region. The patina of weathered copper (the Statue of Liberty's color) is teal because copper carbonate forms there; Bacon's verdigris is the same chemistry. Phthalo turquoise and cobalt teal are 20th-century pigments.
