Athearn GP15-1 cab roof

Ok, this may be really nitpicking, (but since I go as accurate as I can with locos) I noticed the radio antenna on the HO units were a metal or silver color. I've always wondered is this correct or were they blue like the rest of the units that were painted by CR? Still a great unit, but I like to make corrections to small details if needed. I just don't recall ever seeing a radio antenna that wasn't blue.

....I'm curious to see how they'll deal with that on the upcoming Quality painted ones