hummm since you see them maybe the camera can caught sometimes invisible auras?
check this out:
this is a guy in a normal mood, seems the painter can see auras:
here the camera caught lucy liu crowns aura as i often see them
edit:
i didnt mean an electric blue electric guitar but an electric blue(also caleed cobalt blue, a colour) guitar(spanish guitar
edit:
and check out how intense is this girl aura since her hair seems died bk¡lue, not its black its in wikipedia entry for black hair
seems the camera sees bvetter than the human eye