After 3 days the hammies will have pigment, by then you should be able to predict what colour it will be. If it's still pink, expect a lighter colour. After 10 day in total they should all have fur.
How Long Does It Take For A New Born Hamster To Grow Fur?
They would have fur in 10 days
I think its 5-7 day they start getting hair
I bet it will take about a week or two.