Nutmeg is an agouti, and looking from the white on her side I would say she is also berkshire marked. When you say cream, do you mean a pale rat with red eyes? That would be most likely to be champagne

You also get a similar colour with ruby eyes (buff). Would easily be able to tell from a pic when your camera recovers
There is a colour in the UK called cream, but it is still being developed and is not a common colour. These have black eyes. I sent 1 cream rat to the US about 5 years ago along 5 of with the related colour ivory as part of an export that the NFRS arranged.
Most likely outcome will be agouti, but of course as you don't know her background you may well get other colours.