€24 each! - or should that be OUCH!
The only way you can get near a colour that you want Al - is to experiment.
I have never painted up a Mignot - and I don't know what paints they use. I use Humbrol Gloss - and some Revell - where this is a better option for what I do.
However, if I were using Humbrol - I would start with Flesh colour - and experiment from there.
I always use margarine tub lids - which are made of plastic - and plain white on the inside, as pallettes.
Cream, Ivory or White paint will lighten the shade of Flesh. Any of the yellows will change the colour in that direction. Red-Brown will deepen the Flesh Colour ( which is what I use to give rosy cheeks - or to define fingers etc). The more you mix in the "change" colours to your starter colour ( in this instance Flesh), the more the mixed colour will change.
I use the pallettes to mix small droplets of paint - AND RECORD WHAT I USE - for each trial. These colours will change as they dry.
Keep going with those that look promising - and eventually you will come up with something that you can probably live with.
[I may add that for my Glossy TS's I just like the Humbrol Flesh colour as it is for hands/faces - and always use that, regardless of what figure or casting I'm painting. I use Red-Brown for lips - and a mixture of Flesh/Red-Brown for rosy cheeks or shadow areas. If I want highlights - I mix in Flesh/Ivory. I also usually paint in rosy cheeks or highlights, wet into wet - but lips go on last - when the face is dry. ]
That last bit is what I do - Hope that helps - jb