Changed color!

One of my rats, which I thought was a PEW, changed colors in the past few weeks!

Take a look at these pictures,,, he used to be pure white as a baby.  Now he's got darker spots above his nose & around the base of his tail.  Siamese or Himalayan possibly???

Here he is as a baby,,, see, no color.  And no, this doesn't wash off.  lol