The color yellow is associated with optimism, sunshine and enlightenment. Yellow wallpaper and paint are used to make interior spaces bright and welcoming and to encourage creative thinking. However, studies have shown that over-exposure to yellow can increase irritability and frustration.
Yellow wallpaper and paint are often used in kitchens, living rooms and foyers, as yellow is believed to stimulate conversation. Yellow is the most visible color to the human eye with a high reflective value that allows it to act as a secondary light source. Yellow is used for emergency vehicles, traffic lights and cautionary signs around the world. On the dark side, yellow is also associated with cowardice, illness and betrayal.