Here are mixes from Tamiya
DARK EARTH:- XF52:1 + XF64:1
MIDSTONE:- XF59:1 + XF60:1
AZURE BLUE:- X16:2 + XF2:10 + XF18:5
and others...
INTERIOR GREEN:- XF5:1 + XF21:3 + XF65:1
DARK GREEN:- XF58:1 + XF62:5
OCEAN GRAY:- XF18:1 + XF21:2 + XF24:2
SKY:- XF21
MED. SEA GRAY:- XF19:3 + XF54:5