Blaze orange is a tool used to keep you safe from hunters that are capable of seeing it. Deer have picked out my blaze orange many times, whether it is because the deer has escaped other orange clad hunters, or because to the deer the orange is perceived as a solid bright patch of white or gray. The deer that pay no attention to orange have not been conditioned to do so. It only takes 1 or 2 run-ins with hunters for deer to avoid it.