What is the effect of increased activity of melanocytes in the skin?

Increased activity of melanocytes in the skin leads to a higher production of melanin, which is the pigment responsible for giving skin its color. When melanocytes are more active, they produce more melanin, resulting in a darker skin tone. This process is often a natural response to sun exposure, as the body attempts to protect deeper layers of skin from ultraviolet (UV) radiation by increasing pigment production. This mechanism is vital in the body's defense against potential skin damage and is a key factor in determining the overall skin color of an individual.