What is the exact word for cyan color in Japanese language? Is it 青緑 / あおみどり?
If you think of cyan in a technical sense, for example as one of the primary colours in the CMYK model (so
(100,0,0,0)) (in the RGB model probably
(0,255,255)), then in Japanese it would be シアン (シアン on Japanese Wikipedia).
As you can find in the Wikipedia article, there are several colour names, which compare to シアン as follows:
The pictures are from a Google Image search. (I tried to restrict the search to results from Japan, but somehow there are still some results from Chinese websites. Still, I think the strategy is clear here.)