Hello again!
Right, here's what I used:
Extra dark Sea Grey.......Humbrol no-H123
Slate Grey....................Humbrol no-H224
Beige-Green(Sky)..........Humbrol no-H90
I took the two greys and lightened them with a couple of drops of white. I don't know if you can get Humbrol paints where you are, but they are great for UK colours, I recon if you go for the same colours with another brand and lighten them you will be OK.
Hope this helps you out.