The cells producing the pigment responsible for skin color are called what? Melanocytes Cells of the skin's epidermis that participate in the immune response to microbes are called what? Langerhans cells The only layer of the epidermis that contains stem cells capable of continued cell division is what? Stratum Basale The clear layer of the epidermis that is only found in the thick skin located in areas such as the fingertips, palms and soles is called what? Stratum Lucidum What are the pigments that contribute to the color of an individual's skin?