Globally, brown skin tones are the most common due to the prevalence of populations with varying degrees of melanin, which is responsible for skin pigmentation.
While skin color can vary greatly depending on region and genetics, brown skin tones encompass a wide range of hues, from beige to medium-dark brown.
It's important to remember that skin color is a complex and diverse characteristic, and reducing it to a single "most common" color oversimplifies the reality of human variation.