Look at it like humans. We stay out in the sun, we get burnt
I was just going to bring this up, look at it this way...I am a blonde, in the winter my hair gets darker because of less sun and in the summer it gets lighter because more sun BUT I am a BLONDE either way. It just changes
A "fading" horse is still a black horse. Because if you were to keep that same horse inside all day he wouldn't fade. It is a black horse but because of the sun he fades. Fading is the same color, there is no special difference. Your horse is black, black, black. Whether it fades or not.