► 名詞
青 [(1)あお] meaning: blue rank: 1
☆ 日本では信号は緑ではなく青だ ⇨ In Japan traffic signal is blue, instead of green (☛ Comes from a fact that in old Japanese green was considered a shade of blue and there was no separate word for green)
水色 [みずいろ] meaning: blue rank: 4
☆ 水色のシャツ ⇨ A light-blue shirt (☛ Light, pale blue, not aqua blue)
► 形容詞
青い [(2)あおい] meaning: blue rank: 1
☆ 青い空 ⇨ Blue sky
真っ青 [(3)まっさお] meaning: blue rank: 2
☆ 失敗に気がついて彼は真っ青になった ⇨ He realized his mistake and he became completely blue, pale