顔が赤く

one's face turns red

→ 顔
phrase Rare #40,664
one's face turns red Often describes blushing from embarrassment or shyness. This form is usually followed by なる or one of its conjugations.
JA: 褒められて顔が赤くなった。
EN: My face turned red when I was complimented.

真剣な顔顔が赤くなってるわ

Your serious face is turning red.

— タイタニック (1997)

彼は彼女を見ると顔が赤くなった。

He blushed when he saw her.

考えるだけで顔が赤くなっちゃう。

Just thinking about it makes me blush.

私は恥ずかしくて顔が赤くなった。

I was embarrassed and my face turned red.