Recommended pigment colours for Normandy.

[cram]

Looking at giving some armour a bit of weathering. I'm looking at them mainly being used in Normandy campaign's, and am thinking at using pigments to give a bit of a dusty effect to most of the models, with a few slightly more muddier maybe. I will go with MIG pigments, but with so much choice of colours I'm not sure which ones to buy and mix. Wondering what colours members on here have used?

[Suetonius Paullinus]

Dark Mud and Dry Mud for the tracks and maybe some Europe Dust for the hull although it's a little too red-ish for my taste and I prefer a light dusting with Dry Mud or Urban Rubble.

Cheers

SP