expression, godan verb (-ru), intransitive verb
become blue; turn green
Describes a literal color change to blue or green, often used for plants, sky, or objects.
秋になると、葉っぱが青くなる。
In autumn, the leaves turn green.
空がだんだん青くなってきた。
The sky is gradually becoming blue.
expression, godan verb (-ru), intransitive verb
turn pale; blanch
Used for a person's face losing color due to fear, shock, or illness.
彼はその知らせを聞いて青くなった。
He turned pale upon hearing the news.
あまりの怖さに、彼女の顔は青くなった。
Her face blanched with fear.