Cats have a natural instinct to hide and blend into their environment, which is why they often seek out spaces and surfaces that match their fur color.
Black cats may be drawn to lying on black items because the color blends in with their fur, making them feel more concealed and safe.
Anything black, this black cat is drawn to.
Cats will often seek out small, enclosed spaces, such as boxes or bags, as a form of protection and security.
The contrast of the black object with the floor is like a tight space which is attractive to cats.
The same instincts to sit inside small spaces may be what drives some cats to sit on dark objects.
Cats form bonds with their owners and want to be near you.
Cats may sit on dark objects, not because of the color, but because the object smells like you.