Cats come in all sorts of colors and patterns and the diversity can be great even within the same litter. I have heard cats called all sort of colors. Some were accurate, some were so far off they were comical. The shelters and rescue groups that deal with cats get strange cats in all the time. Just because it was labeled something at the shelter does not mean it’s correct. We used to get dogs in from the shelter all the time that were labeled one thing or another and clearly, that’s not what it was. People make mistakes, some people are just guessing.

This is a fantastic chart of cat coloration. I sure hope it helps!
Cat Coloration Chart