I absorbed a feral kitteh into our household a few months ago. I was the first human to ever pick her up, we think. she is balck as night. I have been advised to hide her until Halloween has passed, because some folks are mean to black cats at this time of year.
You are very wise to do that. We have two black cats and keeping them out of harm's way on Halloween is a ritual for us. Sadly there are quite a few sickies in this world that might like to get their hands on them for nefarious purposes.