It makes sense, but they are not genetically autosomal cream "ig/ig" but they are cockerels that are genetically "Golden" The father is sex linked recessive gold based s+/s+ and the mother is sex linked dominant Silver based (S/-) that makes the cockerels S/s+ that will give them a "Lemon/Cream" color, the pullets from such cross will be Buff colored, a bit darker than the roosters.
The reason you see them "almost White" and some faint cream colors is first due to the columbian restrictors found on Buff Orps, they "resctrict" all of the black colored feathers to the very end of the body(think how RIR looks, black tail red) but in the case of buff breeds the restriction is so powerful that no black feathers is left in the body only the gold based feathers, making them all buff colored, but the reason they are buff colored and not red colored is the lack of red enhancers and the presence of gold diluters(Di, Cb) when you cross a buff breed like your rooster to the type of hen on the picture(I see a silver based, eb/eb based partridge hen with no other mutation that will alter the otherwise wildtype phenotype) you will get chicks that hatch cream/yellow and that will be very restricted when they start feathering out, very little black will be present at the end of the fly wings and probably a black feathers, but the body will be Golden/Pale yellow for the roosters and buff colored for the females.
From the looks of the picture the hen genetic code is is eb/eb co+/co+ di+/di+ cb+/cb+ S/- and the rooster is eWh/eWh, Co/Co, Di/Di, Cb/Cb s+/s+ , the result of such cross is eWh/eb, Co/co+, Di/di+, Cb/cb+ S/s+ for cockerels and eWh/eb, Co/co+, Di/di+, Cb/cb+ s+/- for pullets, making the pullets black tailed buff and the males black tailed golden, when they mature the breast will likely stay almost white but the hackle, saddle and shoulders will likely be Yellow/cream colored
You can confirm that with the chicken calculator using the codes I gave or using the reference phenotype:
http://kippenjungle.nl/kruising.html
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outcross outcome using the calculator that results on the same phenotypes and genotypes I mentioned
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This was very informative,thanks so much! So if I am understanding you correctly the chicks aren't a true Cream,just a diluted Yellow/Gold on account of the hens silver gene?Does this make them a sex-link?Also although it doesn't show in the picture the hen on the left has a red breast,so I think she also has a sneaky red gene to go with her silver.Do you think the chicks will show some red leakage as they mature because of this?
