actually a “black” made of very concentraded dark blue pigments:
Some “black” paints/dyes are based on concentrated dark brown pigments
which results in brownish-beige colours
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Black and yellow (or ochre) will make olive drab, the shade of which will depend on the mix of the black and yellow.
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You can verify the ‘black+yellow = OD green’ by opening up a graphics editor, picking ‘0xFFFF00’ (bright yellow) as your selected color, then dragging down the brightness slider, and watching how the perceived color changes.
Yup, Black + ochre were used to make French Artillery Olive as applied to carriages & limbers in the Gribeauval System
All other colours can be made from the three Primaries – red, blue, yellow.
All colours can be tonally modified with white, or “black” which as mentioned is typically an indigo or deepest tan.
Years ago I mixed a marigold yellow with a mid-purple & got a surprising result. Technically they’re near opposite colours on a spectrum wheel so I was expecting they’d cancel each other out to make a warm grey, but no…
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Excellent!
I’ll just get some boxes of those three colours from Humbrol and some matting agent
and then I’ll have my paint needs covered.
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@ Robin (Uncle-Heavy)
On an aside… Just about an hour-or-so after watching the video, the touching story, ‘A Dog of Flanders (1960)’ was aired on TCM (Turner Classic Movies). In it, there’s a scene where a young artist learns from a master painter how to mix black and yellow to achieve green — uncanny! 
…
—mike
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Where I come from, when you mix Yellow and Black you get the Pittsburg Steelers.
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So black + yellow gets you perennial mediocrity and an early playoff exit 
Sorry, I’m a cardinals fan so I have to drag everyone down with me 
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Black + yellow will make olive drab, but it’s not really green (unless you’re just going to paint army vehicles). Yellow + blue will give a much wider range of greens.
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Not on Ice, go the mighty Penguins!! 
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