Rosecomb bantams with blue earlobes instead of white?

[Keeperofmunchkins]

I have a couple of black Rosecomb chicks from ebay eggs that are now 5 weeks old. They look fine except their earlobes are starting to look very blue/turquoise rather than the breed standard white. Is this a sign of poor quality Rosecombs, mixed bloodlines or will their earlobes become whiter as they age?

Here is a photo of the little cockerel:

 

[EggSighted4Life]

mixed bloodlines

This is my guess... maybe they had an accidental mating with a Silkie?

No, I don't believe the lobes will turn white with age.

HE... is a handsome boy.

 

[Keeperofmunchkins]

Yes I was thinking the earlobes probably won't change colour because I have a hamburg bantam hen with blue earlobes. Hamburg and sebright breeds are two breeds I know of that are very similar in features and shape to Rosecombs (clean legs, upright tails, sleek feathering, no crests or beards,all have rose combs, all have slate grey legs). Maybe there is some sebright or hamburg or something similar in the genetics. The photo the seller used for their advert shows birds with white earlobes, but both my chicks have the same blueish lobes.

 

[Keeperofmunchkins]

On second thoughts, sebrights don't have blue earlobes. So probably some hamburg or something similar in there.