Cool colour palettes may be considered calming and tranquil by some while others may perceive cool blue colour schemes as cold, clinical and depressing. Colours categorised as cool include hues featured in imagery depicting snow, ice, wintery climates and cold geographic locations. Cool colours include yellow, green, blue, and blue/purple plus greys and neutral colours with cool undertones. Cool colour illustration by Zena O’Connor, PhD, © Design Research Associates.