Refers to a subtle outward sign or hint of an inner state, feeling, or situation. Often used in expressions like 気色が悪い (feeling unwell or creepy) or 気色をうかがう (to read someone's mood).
A hint of anger appeared on his face.
She stared at the bug with a look of disgust.
show anger; get visibly angry
show signs of emotion; reveal feelings in expression or behavior · put on airs; act self-important · become lively with voices and noise
Standard kanji spelling for this meaning.
Kana spelling is sometimes used, especially in casual writing or when avoiding the less common kanji.
A Sino-Japanese compound written 気色, originally referring to a person’s complexion or outward appearance and hence to a visible sign or indication.