Green

Green, being the color of chlorophyll, a pigment in plants, is linked to nature. As a result, the color green is used to represent environmental activism. Products and actions that protect the environment are often referred to as "green." 

In Ancient Egypt, the color green symbolized rebirth and regeneration. In Islam, green is considered sacred due to its association with the Prophet Muhammad. However, green also carries negative connotations. In medieval art and literature, the devil was depicted in green because it was seen as an attractive color that lured animals. Furthermore, a jealous person is sometimes referred to as being "green with envy."^[1]

The color also stands for growth, youth, and hope in many cultures due to its associations with the spring season and the rebirth of the earth's fertility.^[2]