Well, there is this:
http://www.games-workshop.com/gws/catalog/paintChart.jsp?catId=cat820002a&rootCatGameStyle=paints-tools
it lists all the paints, specific for the army and the "basic" color scheme.
What you need of those ranges however depends... The base, the shades, the layers and the glaze are rather useful
imo, the dry-range not as much since I tend not to drybrush much.
Basically pick a tone and get the appropriate colors according to the table. There's a row for nearly everything (and some neat new stuff, like the new technicals).
I don't know what
DE use for colors speficially, but I'd say.. The
DE line? Metallics for the weapons (Leadbelcher/Nuln Oil/Ironbreaker/Runefang)
Skin like tones (Ratskin line)? This maybe settles the basics you'd require.