I am growing facial hair for the first time ever and think I might be dealing with the same thing as you. Generally dark brown hair is growing in, but mixed in with it seems to be either blonde or ginger hair. Still growing, so I have yet to figure out what color it really is, and if it's really the color, or if it's just transitional hairs that are not fully developed.

Have you kept growing, any updates to this? I'm curious to see how it looks.