What do you call indigo in Sanskrit?

There isn't a single, universally accepted Sanskrit word for "indigo." However, here are some possibilities depending on the context and shade of blue:

* नील (nīla): This is the most common Sanskrit word for "blue" in general. It can be used for indigo, but it also encompasses a wide range of blues.

* कृष्ण नील (kṛṣṇa nīla): This literally translates to "black blue" and could refer to a very dark, almost black shade of indigo.

* श्याम (śyāma): This word means "dark blue" and can also be used for indigo.

* रक्त नील (rakta nīla): This literally translates to "red blue" and could refer to a slightly purplish shade of indigo.

* निळ (niḷa): This is a more archaic Sanskrit word for "blue" that may be more specific to indigo.

It's important to note that the nuances of color terminology in Sanskrit are complex and often depend on context. The most accurate word to use would depend on the specific shade of indigo you are referring to.