I’m sure many with this ability don’t make it known, feeling that most people will just think they’re crazy.
I’ve twice been told I have a blue aura. Blue is my favorite color, but I wasn’t wearing blue when I was told this. The last lady said she tried to tell her eye doc about seeing auras. He didn’t believe her. Oh well...
This provides an extra channel of light sensing into the ultraviolet range, with the visual processing center of the brain converting this into perception of a wider range of colors. I believe that this may account for people who see auras.