Item question

[HC1998]

Hi guys, I was recently gifted a master key and the end is painted a light shade of blue. Is there any reason behind this. If it helps, the key is stamped with "TL".

 

[Domh245]

I seem to recall a story about First Capital Connect painting some of their master keys and there being a bit of anger over the fact that their brighton depot was chosen to have pink keys. I can't remember which depot had light blue, but I'm sure someone will (if my memory isn't playing tricks on me)