Light skin in the context of "Black hair"

White is a historical specification of skin color and a modern classification of race. Most often, it is applied to generally identify people of European origin, but the exact definition of "White" can vary depending on context and points of view. Beyond racialization, the word simply denotes any person with light skin, usually that which is colored carnation.

Description of populations as "White" in reference to their skin color is occasionally found in Greco-Roman ethnography and in other ancient or medieval sources, but these societies did not have any notion of a "White race" or a pan-European identity. The racialized understanding of "White race" or "White people" entered the major European languages in the late 17th century, when the concept of a "unified White people" achieved greater acceptance in Europe, particularly in the context of race-based slavery and social status in the world's European colonies. Scholarship on race distinguishes the modern concept from pre-modern descriptions, which focused on physical complexion rather than the idea of race. Prior to the modern era, no European peoples regarded themselves as "White" and instead defined their identity in terms of their religion, ancestry, ethnicity, or nationality.

White Americans (sometimes also called Caucasian Americans) are Americans who identify as white people. In a more official sense, the United States Census Bureau, which collects demographic data on Americans, defines "white" as "[a] person having origins in any of the original peoples of Europe, the Middle East, or North Africa". Individuals within this group have light skin tones and hair colors that include brown, blonde, black or red. White Americans have historically constituted the majority population in the United States, though their share has been gradually declining in recent decades. As of the latest American Community Survey conducted by the U.S. Census Bureau in 2024, an estimated 59.8% of the U.S. population—approximately 203.3 million people—identify as White alone, while Non-Hispanic Whites account for 56.3% of the population, or roughly 191.4 million people. Overall, 72.1% of Americans identify as White either alone or in combination with one or more other racial groups. European Americans are by far the largest panethnic group of white Americans and have constituted the majority population of the United States since the nation's founding. Middle Eastern Americans constitute a much smaller demographic of white Americans, making up around 1.1% of the US population in 2020.

According to the 2020 census, 61.6% of Americans, or 204,277,273 people, identified as White alone. This represented a national decrease from a 72.4% white alone share of the US population in the 2010 census. The share of Americans identifying as White alone or in combination (including multiracial white people) was 71.0% in 2020, a smaller decline from 74.8% of the population in 2010. As opposed to the declines seen in the white alone population, the number of people identifying as part white (in combination with other races) saw a large increase, growing from 2.4% of the population in 2010, to 9.4% in 2020.

Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among individuals is caused by variation in pigmentation, which is largely the result of genetics (inherited from one's biological parents), and in adults in particular, due to exposure to the sun, disorders, or some combination thereof. Differences across populations evolved through natural selection and sexual selection, because of social norms and differences in environment, as well as regulation of the biochemical effects of ultraviolet radiation penetrating the skin.

Human skin color is influenced greatly by the amount of the pigment melanin present. Melanin is produced within the skin in cells called melanocytes; it is the main determinant of the skin color of darker-skin humans. The skin color of people with light skin is determined mainly by the bluish-white connective tissue under the dermis and by the hemoglobin circulating in the veins of the dermis. The red color underlying the skin becomes more visible, especially in the face, when, as a consequence of physical exercise, sexual arousal, or the stimulation of the nervous system (e.g. due to anger or embarrassment), arterioles dilate. Color is not entirely uniform across an individual's skin; for example, the skin of the palm and the soles of the feet is lighter than most other skin; this is more noticeable in darker-skinned people.