Vallejo Olive Drab

Both flavours of Vallejo (ModelColor & ModelAir) OD are indeed very brown, the ModelAir moreso. The ModelColor OD is more greyish than the ModelAir.

Testors makes a new shade of OD, OD #8, that is supposed to be matched to the WWII OD shade of the same name.

What is the FS number on the Vallejo Olive drab? There should be a FS# labeled on the bottle.

I personally find many Vallejo colors way off (e.g., German dark yellow).  I am not an expert of armor colors. But they don't look right to me and I don't use them although I have lots of Vallejo paints.

I use Tamiya OD lightened with Tamiya Buff.