The article doesn't really make this clear, but in modern Japanese 青 as a color just means blue, unambiguously. There are a lot of set phrases where it refers t

The article doesn't really make this clear, but in modern Japanese 青 as a color just means blue, unambiguously. There are a lot of set phrases where it refers to green, but these have really only survived in cases where the color of the thing is obvious from context. When Japanese 青 is used to specify an unknown color it's just blue.