The dark blue in the background came from indigo.

背景中的深蓝色来自靛蓝染料

The blue dye is obtained from the indigo plant.

蓝色染料是从靛蓝植物中提取的。

The blue vat dye obtained until about 1900 entirely from some species of the indigo plant.

直到大约1900年，蓝色还原染料都是从靛蓝植物中提取的。

The indigo plant was highly valued until the discovery of chemical dyes in the 19th century.

在19世纪发现化学染料之前，靛蓝一直被高度重视。

The importing of the indigo plant to Europe changed the fortunes of many people and allowed color to be more used.

欧洲靛蓝植物的引进改变了许多人的命运，使大家更多地使用颜色。

Have you ever heard the proverb "Blue is extracted from the indigo plant, but is bluer than it"?

你听过“青出于蓝而胜于蓝”这句谚语吗?