Indigo

Indigo is a deep blue pigment that can range from dark black to pale blue. Originally extracted from plants similar to blue woad used by the ancient Britons, it was synthesised in 1878 in Germany. It is one of the oldest blue pigments used universally.

靛藍是一種深藍色顏料，範圍從深黑色到淡藍色。 它最初是從類似於古代英國人使用的藍椴樹的植物中提取的，於 1878 年在德國合成。 它是普遍使用的最古老的藍色顏料之一。