Undertone

n. subdued sound, murmur, faint background noise; underlying feeling, connotation, suggestion; subdued tone of color

Undertone can mean:An underlying or implied tendency or meaning; an undercurrentAn element of an undertone series; a pitch whose frequency is an integral fraction of anotherThe Irish rock band The Undertones
See more at Wikipedia.org...

Noun
1. a quiet or hushed tone of voice; "spoke in undertones"
(hypernym) tone, tone of voice
2. subdued emotional quality underlying an utterance; implicit meaning
(synonym) undercurrent
(hypernym) meaning, substance
3. a pale or subdued color
(synonym) tinge
(hypernym) shade, tint, tincture, tone

(n.)
A low or subdued tone or utterance; a tone less loud than usual.
  

n.
دھيمي آواز, مدھم سر, ہلکا رنگ