They vary from very dark to brown in colour and develop a random pattern on the skin of the individual.[47] Solar lentigines, the other types of freckles, occur among old people regardless of skin colour.[2] People with very light skin (types I and II) make very little melanin in their melanocytes, and have very little or no ability to produce melanin in the stimulus of UV radiation.[48] This can result in frequent sunburns and a more dangerous, but invisible, damage done to connective tissue and DNA underlying the skin.