Eye color in cats is a fascinating trait, but it is also closely linked to genetics and health. In the Maine Coon, a robust and carefully selected breed, blue eyes are not always considered normal: everything depends on the coat color and the cat’s genetic background.

The FIFe (Fédération Internationale Féline), like other international feline federations, defines precise standards regarding acceptable colors and traits.

In solid white Maine Coons, eye color may be blue, yellow, green, or odd-eyed.

In Maine Coons with extensive white patterns such as harlequin or van, blue eyes are accepted, as they are linked to the dominant white gene (WS).

In these cases, blue eyes are a recognized and natural variation, provided the cat is healthy and correctly bred.

In Maine Coons with little or no white, blue eyes are not allowed by the FIFe standard and are considered an anomaly.

This is because, without an extensive white coat or dominant white pattern, blue eyes may indicate the presence of genetic alterations not typical of the breed.

In practical terms:

a brown tabby, black, or other non-white Maine Coon should not have blue eyes;

if blue eyes are present, it suggests the introduction of genes or crossings that are not consistent with the official breed standard.

The dominant white gene (WS), responsible for white coats or large white areas, can sometimes be associated with health issues related to pigmentation.

The most well-known condition is congenital deafness:

it particularly affects white cats with blue eyes;

it may be unilateral (one ear) or bilateral (both ears);

it is not systematic, but the statistical risk is higher compared to cats with other eye colors.

Other, less frequent issues may include:

increased ocular sensitivity to light;

inherited defects associated with improper or non-standard breeding lines (especially when blue eyes appear in cats without white).

FIFe’s decision not to allow blue eyes in Maine Coons without white is not merely aesthetic, but a measure designed to protect the breed.

It preserves the genetic integrity of the Maine Coon.

It prevents the spread of breeding lines with potential hereditary issues.

It ensures consistency, clarity, and long-term health-focused selection.

Blue eyes in the Maine Coon are striking and beautiful, but they must be understood in the correct genetic context:

normal and accepted in solid white and harlequin/van Maine Coons;

not accepted and potentially concerning in cats with little or no white, as they may indicate non-typical genetics and possible health risks.

For this reason, responsible breeders strictly follow FIFe regulations, prioritizing health, balance, and breed integrity over trends or non-standard traits.