What is the medical term meaning localized changes in skin color of less than 1cm?

The medical term meaning localized changes in skin color of less than 1cm is "macule." Macules are flat, non-palpable areas of skin discoloration that can be caused by a variety of factors, including inflammation, trauma, and infection. They are often described as being "freckle-like" or "spotty" in appearance. Macules can range in size from a few millimeters to several centimeters in diameter.