Why are aliens called the greys?

Aliens are commonly referred to as "the Greys" due to their distinctive physical characteristics, which typically include a small stature, large heads, and grayish skin. This characterization is largely influenced by popular culture, especially Science Fiction literature and films from the mid-20th century onward. The Greys are often depicted as extraterrestrial beings involved in abduction scenariOS, which has contributed to their notoriety in UFO and alien lore.