Below is a couple pics of recently shed hypomelanistic everglades rats, shown with normal phenotype heterozygous babies.
It's amazing how much these will change as they become bright orange adults. Even the black hets will end up as orange everglades but they will have melanin including the black dorsal stripes which will be completely absent in the hypos

Above, a het with a hypo baby showing the significant effect of the hypo gene
below is the hypo father of all the babies shown above