I say:
Ziggy is eeYellowblack
Tucker to me looks Cream ROAN Banded as only his head has color and the rest of his body looks white. Roan + Banded = and almost all white hamster with coloring focused only about the head and sometimes only a skull cap between the ears.
Tiggy has agouti markings and I can just make out a few black ticked hairs in that photo so I would say Umbrous Yellow
LIL Bear could be a juvenile stage Umbrous Heterozygous Extreme Dilute Black
or he could be a very very poor quaility Black carrying Cinnamon which will make a black coat go reddish brown black quickly
Here is Ieon who is an Umbrous Heterozygous ED Black pup at 5 weeks
Attachment 28628
in this shot you can see his dark brown black smudge on his nose which is seen with Heterozygous ED Blacks
Attachment 28629
Here's Amal who is a 3 generation pedigreed Umbrous Hetero ED Black Band
this was taken 10-14-14
Attachment 28626
and him on 11-6-14
Attachment 28627
Note How he has darkened quite substantially in just a few weeks
Hope this helps you determine the colors of four lovely hamsters