Since green is a secondary color, it was more difficult to produce it. Egyptians found a way to create green paint by using copper. Then, during the Middle Ages, green became more popular since they discovered some different ways to produce it. However, it took centuries before the green dye was mastered by dyers. Luck is often associated with this color because it was an unstable dye or paint that could even be toxic in some cases. It is one of the reasons why green clothes were avoided by comedians for a long time. It is even said that it is because Moliere wore green that he died a few hours after a performance.
Although green is used by many countries across the globe, this color is the most used on African flags. Green is often associated with hope and nature; however, it is mostly because it is the color related to the kingdom of heavens in many religions like Islam. The Irish added a green stripe on their flag to represent the Roman Catholic Church too. Otherwise, Brazil first used green to represent the Bragance royal family, the family of emperor Pedro 1st. After it became a republic, the color was associated with the forests, which are very important resources in this country. Algeria, Saudi Arabia, Italy, Mexico, Portugal, Ireland, and Iran also use green on their national flag.