What are the roles of heridity and the environment in a persons natural eye colour?

Hereditary factors play a significant role in determining a person's natural eye color, as eye color is primarily influenced by multiple genes inherited from parents. The amount and distribution of melanin in the iris, which is influenced by these genetic factors, determine the specific shade of eye color. The environment has a minimal direct impact on eye color but can influence factors like exposure to sunlight, which may affect melanin production over time. Overall, while genetics primarily dictate eye color, environmental factors can have some subtle effects.