Desert Yellow #977 or Sand Brown #876.
Comparing to photos of items in Coyote Brown (never heard of that before, but then again I'm not too much into ultramoderns), I would agree that Sand Brown #876 looks like a very close match. Alternatively, use English Uniform #921 as a base.
I would use Desert Yellow only for highlights and maybe combine it with the Army Painter Soft Tone; I'm a big fan of Desert Yellow, but IMHO, it has a much more yellowish tinge than the samples of Coyote Brown I've seen would suggest.