Yellow is the color of warning or caution. It is often used in road warning signs, especially for roads with hairpin curves and in areas where there has been a landslide. School buses are often yellow to caution other drivers. Yellow gives the impression of an unexpected event. The general image of yellow is positive, energetic and jealous. Since Judas, who betrayed Jesus Christ, was wearing a yellow robe, the color also has a negative image in the Western world but in the East, yellow is considered to be religious color in Hinduism or Buddhism.