undertone

[ uhn-der-tohn ]
/ ˈʌn dərˌtoʊn /

noun

a low or subdued tone: to speak in undertones.
an unobtrusive or background sound: an undertone of static from the receiver.
an underlying quality or element; undercurrent: There was an undertone of regret in his refusal.
a subdued color; a color modified by an underlying color.

Origin of undertone

First recorded in 1800–10; under- + tone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for undertone

British Dictionary definitions for undertone

undertone
/ (ˈʌndəˌtəʊn) /

noun

a quiet or hushed tone of voice
an underlying tone or suggestion in words or actionshis offer has undertones of dishonesty
a pale or subdued colour
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012