colour wheel

Noun

 * 1)  A planar circular chart in which related colours are adjacent, and complementary colors are opposite.
 * 2) A device that emits varying colours of  by the use of a, commonly used to illuminate Christmas trees.

Translations

 * Esperanto: kolorcirklo
 * German: Farbkreis, Farbrad
 * Maori: taeāwhio
 * Spanish: rueda del color