I have two different M-485 Blue Gray paints here in the plastic ruination shop,,,,,,,my favorite is the Color of Eagles #3048, it matches the FS 350189 chip,,,,,,,but, it is OOP now, and I only have two bottles,,,,,,,,so, I have 2 bottles of Model Master Acrylic #4847 Blue Gray M-485,,,,,,,,,it is a little lighter and a bit bluer than the FS chip
I only need less than a dozen 1/72 scale prop planes for my planned theme,,,,,,,so, I think I have enough blue-gray to do the topsides of those