It seems the PolyTerra one isn't available in Europe yet, even Amazon doesn't have it. I mean, amazon.com has it, but amazon.fr only has the regular colors, not the Muted White… I found a PolyTerra distributor not too far and sent them a mail to see if they ever intend on selling it, but I guess everyone is on vacation.
Also, I ordered some samples from where we currently get our filaments for the fablab, and though the white, cream white and limestone white are way too light, the
DailyFil Light Grey is not too bad of an approximation, a bit bluer, maybe less red, according to the histograms in GIMP (on a rectangular selection it does give some hints), although looking at under the feet of my Apple Keyboard II it too is quite grey and less beige than the rest.
I guess I'll have to do some test prints to get flat surfaces, as these wires are not easy to compare.
It also seems to be quite close to the ORIC1 grey.
Oh, and I sent a mail to the contact address for the
Encycolorpedia to see if they would be willing to add filaments to their database, which could be useful for such matching in the future.