FAA Firefly

I'm building an Eastern Express Firefly in Pacific FAA colours, but the trouble is there's no details on what these are. No paint sheet or decal instructions at all. I've done the internet to death, but all I've gleaned is that it's probably Dark Slate Grey 9tho one said this is more like light olive drab) and Extra Dark Sea Grey.

Here's a link to a review with a pic of the box, where it looks blue and green. Boy, am I confused

http://www.fortunecity.com/meltingpot/portland/971/Reviews/50s/firefly-eastexp.htm

Any ideas in Humbrol od FS colours would be gratefully received.