The most natural eye color is brown.
Brown eyes are the most common eye color worldwide, found in a vast majority of the human population. This prevalence is due to a higher concentration of melanin, a pigment responsible for color, in the iris.
While blue, green, and other eye colors exist, they are considered less common and are often linked to genetic mutations that affect melanin production.
Brown eye color is considered the baseline, with other eye colors evolving from it over time.