Some cultures are superstitious about black cats, ascribing either good or bad luck to them. Many sailors do the same. For instance, In the United Kingdom it is commonly considered that a black cat crossing your path is a good omen.[1]

There is even a black cat "rusting" (coat turning a lighter brown shade) in sunlight. [1]

But if you want something a different angle on black cats, read
"The Black Cat" by Edgar Allan Poe. A most disturbing horror short story.

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[1]
https://en.wikipedia.org/wiki/Black_cat

The Black Cat
by Edgar Allan Poe
(published 1845)
http://poestories.com/read/blackcat

https://www.facebook.com/BlackCatAppreciationPage