Artificial intelligent assistant

Ink label kanji? So I was looking at a modular kit that was made in Japan, and inside of the box were some ink labels (I think CMYK). Here is a picture: ![Ink labels]( I recognized three of the four kanji. The first being (black ink), third as (red), and the fourth as (yellow), but I cannot seem to recognize the second label. I have looked by radical and in the WWWJDIC dictonary by Jim Breen and could not find it. Could someone tell me what this is? I used the search terms "blue", "azure", and "cyan".

It's -- the character for indigo.

xcX3v84RxoQ-4GxG32940ukFUIEgYdPy 019e8350e4cd818b131a2cbdfd9630c2