expression, ichidan verb
change color; look completely different
Describes a sudden, dramatic change in facial expression due to strong emotion such as anger, shock, or embarrassment. Often used with ほど or くらい to emphasize intensity.
彼は怒りで血相を変えた。
His face changed color with anger.
その知らせを聞いて、彼女は血相を
Upon hearing the news, she dashed out, her expression completely transformed.