lol with the silver ones in Gerbils, they are 3 Silver colours, Lilac(darkest) Saffire(middle) and Dove(lightest), our Lilac baby is clearly darker then then the Saffire baby, with meant we could have had either Saffire and Dove or Lilac and Saffire, and Dove isnt a colour possable in this litter, so the colours have to be Lilac and Saffire. the black one, is well..black lol we werent so sure of her being black for a while though because she carries a Diluting gene, with makes her black look more like dark grey, there is no colour name for a faded out black lol

you can go here : http://home.wtal.de/ehr/gerbils/colors.htm to see more gerbil colours