Use of colour; tone.

(slang, derogatory) To complain about the tone of one or more participants in a debate or discussion, especially one perceived as heated, disrespectful, etc.

Synonym of timbre (“quality of a sound independent of its pitch and volume”)

present participle of tone police

(derogatory) Insistence that another party in a discussion adopts an unconfrontational or relaxed attitude.

Synonym of comfort noise

simple past tense and past participle of half-tone

(Internet) A symbol conveying the tone or context of a message.

Any of various deep, rich hues.

In a tone-deaf manner.