A black
cat is
a domestic cat with
black fur that may be a mixed or specific breed. Any
cat whose fur is a single color, including black, is known as a
"solid" or "self". A "solid black" cat may be
coal black, grayish black, or brownish black. Most solid-colored cats result
from a recessive gene that suppresses the tabby pattern. Sometimes the tabby
pattern is not completely suppressed; faint markings may appear in certain
lights. Source