English edit

 countershading on Wikipedia
 
Ibexes’ countershading help them blend with the surrounding desert landscape.

Etymology edit

From counter- +‎ shading.

Noun edit

countershading (usually uncountable, plural countershadings)

  1. A pattern of animal colouration, existing as a form of camouflage, characterised by darker pigmentation of the upper side and lighter of the underside.