The Russian blue only comes in one coat color—an even, uniformly bright blue with no markings, according to the breed standard.
Chartreux cats are the national cat of France. This breed likely originated in ancient Persia and is rare outside of Europe. This kitty is almost immediately recognizable for its blue-gray fur and copper-colored eyes.
Nebelung means "creature of the mist" in German. This blue cat certainly seems like it could disappear into the fog of an early morning.
The Korat is a dark blue cat breed, described by Thai natives in its homeland as “rain-cloud gray” with a “seafoam” effect on its silver-tipped coat. According to the breed standard,
The British shorthair is often thought of as a blue cat. It is one of its most common colors that, at one point, the breed was called a "British blue."
The Oriental shorthair sports a coat in many colors and patterns, so this is not an exclusively blue cat breed. However, when the Oriental has a blue coat it is among the most striking looks for this breed.
Famed for their small folded-over ears, the Scottish fold has a rather impish-looking appearance. These cats are usually anything but impish in personality.
Persians are known for their long, flowing coats and flat faces with bright eyes. This cat breed comes in dozens of colors. Blue was once considered the most desired coat color for this breed.
When you say “housecat” in the U.S., you're likely talking about an American shorthair. They are extremely common pets in North America,