vibrancy

Concise Oxford English Dictionary © 2008 Oxford University Press:
vibrant/ˈvʌɪbrənt/

▶adjective

• 1 full of energy; lively.

  ■ (of colour or sound) bold and strong.

• 2 quivering; pulsating.

– derivatives
vibrancy noun,
vibrantly adverb.

– origin C17: from L. vibrant- ‘shaking to and fro’, from vibrare (see vibrate).