Reality itself is steadily becoming more colored. Think of what factories were like, especially in Italy at the beginning of the 19th century, when industrialization was just beginning: gray, brown and smoky. Color didn't exist. Today, instead, most everything is colored. The pipe running from the basement to the 12th floor is green because it carries steam. The one carrying electricity is red, and that with water is purple. Also, plastic colors have filled our homes, even revolutionized our taste. Pop art grew out of that and was possible because of this change in taste.