lowkey

/L OW1 K IY0/
adjective
  1. 1

    Dark; characterised by dark tones and muted colours.

  2. 2

    Restrained, subtle, not trying to attract attention.

    โ€œShe deserves an Oscar for her low-key performance in that movie.โ€

Antonyms

Source: https://en.wiktionary.org/wiki/low-key, https://en.wiktionary.org/wiki/lowkey