蓝靛的英文：
indigo

He slipped into an indigo tank.
他滑落到蓝靛桶中。

The indigo plant or the blue dye obtained from it.
假蓝靛靛蓝植物或从这种植物中提取的蓝色染料

Duke Ellington and his orchestra recorded a famous song – Mood Indigo – about the deep blue color, indigo.
艾灵顿公爵和他的乐队录制了著名的歌曲—关于深蓝色，靛蓝—芳心之歌。

You can see a realistic eye or just a shape filled with indigo or purple colour.
你或许能看到一只逼真的眼睛，抑或是一个深蓝或紫色的图形。

What sorcery under the sun did they have inside their indigo robes?
他们褪色的青衫里，究竟藏着什么法术呢？

"Compounds having five-membered heterocyclic rings include chlorophyll, hemoglobin, indigo, tryptophan, and certain polymers."
五种成分的杂环化合物有叶绿素、血红蛋白、靛蓝、色氨酸和特定的聚合物。