Here's how it works:
* Melanin: Melanin is produced by cells called melanocytes. The more melanin present in the iris (the colored part of the eye), the darker the eye color.
* Iris: The iris contains a layer of cells called the stroma, which is where the melanocytes reside.
* Variations: The amount of melanin in the stroma can vary depending on genetics, resulting in different eye colors.
Here are some specific examples:
* Blue eyes: Cats with blue eyes have very little melanin in their irises. The blue color is actually a reflection of light off the underlying structures of the eye.
* Green eyes: Green eyes have a moderate amount of melanin, giving them a greenish hue.
* Yellow/Amber eyes: These eyes have a high concentration of melanin, resulting in a yellow or amber color.
* Odd eyes: Some cats have different colored eyes (heterochromia). This occurs when the amount of melanin differs between the two irises.
It's important to note that eye color in cats is not directly related to breed, although certain breeds are more likely to have specific eye colors. For example, Siamese cats are known for their striking blue eyes.
Ultimately, the color of a cat's eyes is a beautiful and fascinating expression of its unique genetic makeup.