In process colour printing, they are: magenta, yellow and cyan. They are called subtractive primary colours because each of these colour will absorb or subtract one third of the colours in the white light.

• 在彩印方面，它们是：洋红，黄及青蓝。它们被称为减色法原色是因为它们每个颜色会吸收或减去白光内的三分之一色光。