Surgical equipment is always wrapped in green for a few reasons:
Contrast: Green is the complementary color of red, which is the color of blood. This contrast makes it easier for surgeons and other medical staff to see any blood or other bodily fluids on the surgical drapes and towels.
Perception: Green is also associated with nature and growth, which can be seen as a positive and reassuring color in the surgical setting.
Tradition: Surgical equipment has been wrapped in green for over a century, and this tradition has continued to this day.