Distribution of Human Skin Colors Worldwide

Based on the differences in human physical characteristics, especially skin color, the world's human races are mainly divided into the white race, yellow race, black race, and other races. The following is the specific distribution of global racial skin colors:
White Race
Main skin colors: From white-red to dark brown.
Distribution areas: Centered in Europe, and widely distributed in the Americas, Oceania, northern Africa, southern and western Asia. For example, European countries such as the United Kingdom, France, and Germany; American countries such as the United States and Canada; Oceanian countries such as Australia and New Zealand; northern African countries such as Egypt and Libya; and southern and western Asian countries such as India, Pakistan, and Iran.
Reasons for formation: They mostly live in relatively cold regions where the sun's rays are oblique, with weak light and ultraviolet radiation. The melanin content in the skin is low, and light skin color has formed through long-term evolution.
Yellow Race
Main skin colors: From light yellow to brown.
Distribution areas: Centered in Asia, including eastern and southeastern Asia, such as China, Japan, South Korea, North Korea, Mongolia, Vietnam, Thailand, Myanmar and other countries; and also extending to the Indians in North America.
Reasons for formation: Living in temperate regions of Asia and other areas with moderate sunlight intensity, the melanin content in the skin is moderate, gradually forming the skin color characteristics of the yellow race.
Black Race
Main skin colors: From black to black-brown.
Distribution areas: Centered in sub-Saharan Africa, and also distributed in the New World, India, Sri Lanka and other regions. For example, African countries such as Nigeria, Kenya, and South Africa; and a large number of black people also live in American countries such as the United States and Brazil.
Reasons for formation: They mostly live in tropical equatorial regions with long hours of direct sunlight, high temperatures, and strong ultraviolet radiation. The high melanin content in the skin helps absorb ultraviolet rays from sunlight to protect the skin.
Other Races
Brown Race
Main skin colors: The skin is brown; for example, the skin of Australian Aborigines is brown (chocolate-colored).
Distribution areas: Mainly distributed in mainland Australia, including Aboriginal people and Torres Strait Islanders; also in islands of Southeast Asia and Oceania.
Reasons for formation: Having lived in tropical and subtropical regions for a long time, they have adapted to the local sunlight and environmental conditions, forming characteristics such as brown skin.
Mixed Race
Main skin colors: Diverse skin colors, depending on the racial composition of their mixed ancestry.
Distribution areas: Distributed all over the world, with a concentration in the Americas, such as Latin American countries. Due to the integration of European colonizers, African slaves, and local Indians in history, a large number of mixed-race people have been formed.
Reasons for formation: Intermarriage and genetic exchange between different races have led to mixed and diverse skin colors and other physical characteristics of their offspring.