As an expert in genetics and human eye color, I can tell you that eye color is a complex trait influenced by multiple genes. Hazel eyes are a mixture of colors, typically green and brown, and they occur when the front layer of the iris (the part that gives the eye its color) is not fully pigmented. Blue eyes, on the other hand, are a result of a lack of pigmentation in the iris, and they are caused by the scattering of light.

The rarity of blue hazel eyes is not well-documented because they are a unique combination. Hazel eyes are less common than blue or brown eyes, and when you add the blue component, it becomes even more unusual. It's estimated that blue eyes are present in about 8% of the world's population, while hazel eyes are around 5%. However, these percentages can vary significantly by region and ethnicity.

Given the rarity of both blue and hazel eyes, the combination of blue hazel eyes would be considered quite rare. It's important to note that genetic traits can be unpredictable, and the actual occurrence of blue hazel eyes can be influenced by many factors, including the specific genetic makeup of an individual's parents.

read more >>

Melanin Content and Eye ColorEye colorMelanin Presence on Front Layer of IrisDominant Pigment TypeGrayEven less than blueEumelaninGreenMore than blue eyes, less than brownPheomelaninHazelMore than green, less than brownPheomelanin and EumelaninAmberHeavyPheomelanin3 more rowsread more >>