The colour looks rather desaturated and sort of red-purple-brown-ish. Here is what I would try. Get your purple paints (any thing from pink, to real purple to blue-ish reds) and your skin colour paints (all those desaturated orange red browns and even desaturated grey browns). And now try find one 1:1 mix of one colour of each side (one skin colour and one purple colour) that looks a bit lighter than what you need because it will darken a bit once painted over black primer (and get a bit more desaturated too).
As a starting point (I looked these up on the
GW site (
here) so no points for real colour accuracy for me): Either
Daemonette Hide or
Naggaroth Night and
Mournfang Brown or
Khorne Red. Of course if you have other paints just try some that you like and look for a combination that you like.
You could also go with a slightly reddish brown that you then glaze/wash (in this case meaning tinting the whole surface by painting a very diluted layer of paint) with a strong medium purple. That could work with the colours mentioned above. It just depends on how you want to paint and which gives you the better effect.
Just don't try to force an exact 100% match as you are comparing a photo of a painted/lighted and colour corrected image on a screen to a miniature that you are actually seeing directly in your hands. Also your colour perception depends on the other colours on your miniature, meaning that even if you had the exact colour and compensated for the photo/lighting then it would still look different if you used another colour scheme as colour perception is highly dependent on neighbouring colours (in this case some very dark and very light parts, thus pushing the purple somewhat in the middle). It would for example be perceived as looking a bit darker if the rest of the miniature were painted white (and no other parts with very dark shading).
Also if you want this colour for an army and not just one miniature then it pays off to keep the recipes very simple, as in: Try to stay with two paints and as few steps as possible for ease of reproduction.