no blue lights

I went to the shooting range with a friend last week.  I left my safety glasses at home so I bought a new pair.  On the way home, I see that this county has changed their green "go" lights to blue.  I said, "Man, that's so cool that they changed the lights to blue."  My buddy looks at me strangely and says, "That's a green light."   I thought that something was wrong with me, then realized that I still had my new yellow shooting glasses on.    Yes, I was blond before I turned grey.