They also say the English “green”, as pointed out in the Wiki article. So there’s 3. :)

In most context ao is definitely blue. It’s not green at all. The color of the sky is blue. Blue as green shows up in a few spots, the city/prefecture Aomori, the blew Forrest, or aotogarashi, the blue chili pepper (which is like a mini Serrano). I’m not an expert on the language but I’m sure there’s a bunch more.