Yellows are simulating and can act like a warning. Lemon yellow is associated with sour. Like the sun yellows are uncomfortable to look at for an extended period of time. Lime, Leaf Green, Sea Green, Emerald, and Teal. The human eye is most sensitive to greens.
Humans see more shades of green than any other color.
Greens represent life, like trees, grass, and plants, and give us a calm natural feeling. Cyan, Sky blue, Dark Blue, Violet, and Purple. Blues are tranquil and cold. Blue is open and wide like the sky or deep and cold like a lake. Blue is a color of distance and is effectively used as a background color.