Is blue called 'Blue' or 'Indigo' in English?

Is blue called 'Blue' or 'Indigo' in English?

The real answer was: What is blue called Blue or Indigo in English?

I used to think the two colors were the same. A few days ago I found out that the two colors are different.

Blue means blue. And

Indigo means purple blue



How is this purple blue again?



See if the difference can be made. I knew two different colors but couldn't tell the difference