MarquisMini said:
i use acrylics,mostly Vallejo and somo Andrea.
Okay, that helps, so you won't get more oil paint recipes
First off, if you haven't seen it yet I'd recommend a peek at
this old article by Mario Fuentes; great intro to the careful, methodical approach best suited to working in this kind of paint.
As to 'whites' I think when painting uniforms, especially something that was used in the field, that they should never really look white. Historically, even when brand new, cloth was rarely as white as we have in our mind's eye today and even a single wear could soon see something start to looks a little grubby.
After a couple of months knocking about in them - probably without a single wash - nobody is going to have anything
white. Here's a recipe that sounds like a decent middle-of-the-road version:
Midtone - 1:1 mix of Offwhite (820) and Buff (976)
Shading - darken midtone progressively with Chocolate Brown (872)
Highlighting - add more Offwhite to midtone mix or glaze with it neat
Play around using this as a basis, maybe using Light Flesh instead of Offwhite for the midtone (perhaps with a 1:1 mix of Light Flesh and white for lightest colour), Sand Yellow or Beige instead of the Buff.
IMO we should never
ever shade whites with black by itself - it almost always looks wrong and other painters know the colour you get and can spot it a mile away
But if you prefer to mix colour more from scratch you can certainly use some black, just modify with a dark brown. So White plus Black with roughly an equal amount of Chocolate Brown, Burnt Umber or Saddle Brown; or alternatively more of something like Sunny Skintone or Flat Flesh (maybe 3:1 with the Black).
Einion