I'm with a cat rescue and there is a definite hierarchy in cat colours.
The most popular by far is grey/blue/silver (all the same thing)
Even an unfriendly, bitey grey cat will fly out of the door.
Then it's ginger
Then tortie/calico/tabby/tabby and white
Then black and white
And, way, way below all those are black cats. They are so very much harder to home than any others. Even the sweetest, friendliest black cats and kittens stay with us many weeks or even months longer than the other colours, and a shy black cat will have to wait months for a home, even years.
The shallowness regarding colour preference of so many adopters upsets and dismays me frequently..