Why Some Black Cats Look Different in the Sun

Often associated with Halloween, witchcraft, and bad luck, black cats have historically been linked to witches due to superstitions from the Middle Ages. Fortunately, there are also positive myths surrounding black cats, such as them enhancing your love life or improving your financial situation. Regardless of your opinion on black cats, these intriguing felines undoubtedly pique human curiosity.

The Coat's Appearance in the Sun

Black cats often possess a tabby pattern, which may not always be suppressed. It's common for them to exhibit faint markings in certain lights. For instance, many black cats develop a "rust" in sunlight, causing their coat to turn a lighter brownish shade.

Even the blackest of black cats can look different in the sun. This can be partly due to feline genes. Cats' bodies, like humans, are made up of genetic materials, called genes. Genes and their associated alleles are responsible for the color of our eyes, the pigment of our hair, and other inherited physical traits from our forebears, such as long legs.

Additionally, melanin in cats' hair determines eye, skin, and hair color differences. Melanin is present in hair shafts as microscopic granules varying in shape, size, and arrangement, contributing to the variety of colors in black cats' coats.

Recessive Genes in Cat Hair

Genes can be dominant or recessive. This is how a very black cat may appear as a brown cat in the summer sun—as a possible result of a recessive red gene. This is especially common in longhaired black cats. You may also have seen black cats with white roots, which are called "smokes."

It is believed that the original color pattern of all domesticated cats is the tabby. According to this theory, most cats today carry a recessive gene for tabby. However, solid-colored cats, including black cats, have another recessive gene that suppresses the tabby pattern. If the tabby pattern is not completely repressed, faint tabby markings may be visible on a black cat in bright light, with the tabby "M" being the most distinctive.

The Cat Might Not Be Black

The cat you see in sunlight might not be black to begin with. While the rarest cat color is fawn, a diluted cinnamon commonly found in Abyssinians, you might be observing a yellowish-brown cat.

There are also mutations of the black coat, such as chocolate, which often results in the summer brown hue on black cats. However, true chocolate-colored cats exist year-round, notably Havana browns and Persians. Additionally, solid black cats exhibit color variations, including coal black, grayish black, and brownish black.