Banded(Represented by BaBa or Baba, dominant pattern but banded can be bred to banded (as long as they do not both carry white belly.) The band should be centrally placed just behind the shoulders and forward of the hips, taking up 1/3 of the bodies length. It should fully go around the hamsters’ middle, though commonly bands have a break (this is marked down in judging). The edges should be sharp and in parallel. The coloured body should have no other white patches on it. The belly fur should be white.
Dominant Spot(Represented by Dsds, the colour is Homozygous Lethal, if two Dom spots are mated together the pups that inherit it from both sides will die in the womb) The hamster should be a white hamster with coloured spots, and not a coloured animal with some white patches. They should be sharply defined patches (so the colours stay clear, not merged. As with other patterns the belly fur should be white. Most dominant spots will exhibit a blaze of white down the nose.
Roan(represented by Whwh, this colour is dominant, if two carrying Wh are bred together any pups getting it from both sides will be Anophthalmic (Eyeless) whites) The hamster should have white hairs ticked through the colours coat hairs, with the head being the 'natural' colour of the animal, gradating down to a white rear end.
NOTE! In colours that do not have cream in them (ee) this colour is only shown through the animal having a white belly, this is of course masked if the hamster has any other patterening, as the other patterns give the hamster a white belly. Extreme care should be taken when breeding any two patterns together for this reason.
Tortoiseshell(Represented by Toto, this is a sexed link gene, and so tortoiseshells are female*) this colour is co dominant, so an animal with the yellow gene will show it, but will also show any non yellow colours they have. A tortoiseshell female only has one copy of the yellow gene, To, and as such should show a mosaic of yellow and non yellow coloured patches in their fur. Yellow can combine to produce other colours (for example honey or smoke pearl) for this reason a cinnamon tortoiseshell will be cinnamon with honey patches and a dark grey tortoiseshell will be dark grey with smoke pearl patches. most common and striking though are black hamster with yellow patches (technically yellow black patches) The colour should be balanced, the animal being half the yellow colour and half its non yellow colour.
* Rarely there can be male tortoiseshells, this is where the male instead of being XY is XXY, thus instead of being ToY is yellow it would be TotoY.