Because color impressions are both quick and long lasting, decisions about color are a critical factors in success of any visual experience.
Color can sway thinking, change actions, and cause reactions.
Traffic lights send this universal message. Likewise, the colors used for a product, web site, business card, or logo cause powerful reactions. Color sends a subliminal message, one which plays a critical role in success or failure. Color combinations can attract or distract. The human brain requires a sense of order or it will reject whatever it sees.