Woolpert was unaffected by issues of skin color. It has no effect on skin color. They include mostly those of non-white skin color. PIH occurs more frequently in people with darker skin color. Melanin is a dark pigment primarily responsible for skin color. Research seems to contradict Manning's explanation about skin color. They are based on the Fitzpatrick scale for classifying human skin color. They criticized the divisions and prejudices within the black community based on skin color. She also recalled feeling unaccepted and ostracized for her skin color. His attempts to change his skin color fail. Williams cited flushing as an example of humans' skin color being influenced by their emotions. The Incredible Hulk would revert to his original grey skin color in issue 325. Religious conversion was sometimes described figuratively as a change in skin color. MC1R and its relation to skin color had already been discussed by . This eventually produced the current range of human skin color.