Why do Siamese cats get darker?

Siamese cats get darker because of a temperature-sensitive gene that controls the color of their fur. This gene affects pigment production and only activates in cooler areas of the body — such as the ears, face, paws, and tail — which is why those areas are darker.

As Siamese cats age, or if they live in cooler environments, their bodies can darken overall. Illness, weight gain, or changes in body temperature can also play a role. So if your Siamese is getting darker, it’s usually a normal part of their biology, not a cause for concern. It’s one of the many things that make their coat so unique.