No matter the season our natural landscape is an ever-changing riot of colors, in particular shades of browns, greens and blues. Birds, insects and flowers tint and hue the world with splashes of ...
Johann Gottlob Kurr, "The Mineral Kingdom" (1859), grayish blue is visible on the iron ore (bottom row, right) (all images from "Nature’s Palette: A Color Reference System from the Natural World," ...