Jim,
if you were painting specs on figures reperesenting the ´team´ I wonder who´d be getting what colour!!!!!!!!
Another couple of suggestions:
1- Paint the lenses silver or gunmetal as if they are catching the light
2. Paint them a blue grey and using a very fine brush paint a small white line diagonally across each lens- It is a sort of stylised technique sometimes used on vehicle windscreens.
Cheers
B
(THAT´S A COOL GUY MEANING I´D GET LIGHT BLUE!!!)