White and black are always the first colours to be named. No matter the culture. Next comes red. Blood and bones. Fear and violence. Throughout human history, this is the way it has been. They named things they were afraid of, things that threatened them.
So they could warn others. So the group remained safe.
Danger and comfort, or against.
No one talks about the fourth colour. We work in threes. Fourth place might as well not exist.
But it was probably blue. A clear sky. A cool lake. A respite. Before the winds and the wars rolled in, again.