Green, which occupies the middle station in the natural scale of colours and in relation to light and shade, is the most effective, distinct, and striking of the compound colours. From citrine to olive, it contrasts more agreeably with all colours than any other individual colour. It has, accordingly, been adopted with perfect wisdom in nature as the general garb of the vegetal creation. ~George Field, English chemist and color theorist, Chromatography, d. 1854