On a commonly accepted color wheel, which colors are primary colors?

A color circle usually shows the relations between different colors. The typical color wheel includes the blue, red, and yellow primary colors. The corresponding secondary colors are green, orange, and violet or purple. The tertiary colors are red–orange, red–violet, yellow–orange, yellow–green, blue–violet and blue–green.

Most color wheels are based on three primary colors, three secondary colors, and the six intermediates formed by mixing a primary with a secondary, known as tertiary colors, for a total of 12 main divisions.