Ken Aston was head referee at the 1966 World Cup championship. On the way home he had a brainstorm as his car came to a stop: He decided to apply traffic light colors to soccer. By the time the 1970 World Cup came around, each player knew what was coming when the referee stood in front of him with a yellow or red card.

German soccer fans love the fast food classic “red-and-white fries” (with ketchup and mayonnaise). Could that be the reason 25 percent of soccer club jerseys in the first to third leagues are red and white?

It spreads fear and terror in and out of school: the red pencil. An experiment showed that test subjects who used red pencils to make corrections to a text found 26 percent more errors than those who used a blue one.

When it comes to favorite colors, blue is usually at the top. Among women, only violet enjoys similar popularity. However, the fact that most hyperlinks on the Internet are blue is probably due to another reason: while many people suffer from red-green color impairment, blue blindness occurs markedly less often.

Australia recently introduced the color violet to their weather maps—for record temperatures over 50 degrees Celsius.

The eye perceives colors differently as one ages. Most people over 70 years of age regard shades of blue as soothing.

The color and shape of stop signs the world over are nearly identical so that foreign drivers can react appropriately.

According to the manufacturer Haribo, every bag of bears contains the same ratio of flavors. The color red dominates because there are light (raspberry) and dark (strawberry) red bears.

A driver can already see from afar which brand of gas he is heading towards based on the station’s colors.

We can memorize units of form and color especially well. Especially those of famous cartoon characters. How fast can you identify the above depicted series heroes?

The decision to buy something has a lot to do with visual perception.

A survey shows that most German men (47%) think blonde women are the most attractive, followed by brunette (29%) and black-haired women (18%).