Green has always been an important colour for humans to differentiate - but why? Well: "Green space sweeps the planet. Before skyscrapers and suburbs popped up, our ancestors resided in forested regions full of greenery. As they scavenged for food, the ability to differentiate between colored berries against the backdrop of green foliage was critical for survival. The evolution of eyesight and the increasing ability to detect color with fine detail gave our primate ancestors an evolutionary adva