They might be PBE (prairie bluebell eggers) they are very good too and I recommend them. In England we call them emeralds. You might be able to get bluebells but as far as I know they only exist in England
RIR X JG is a good dual purpose cross. Or australorp in the place of jersey giant. Brahmas could work when crossed with RIR. The best cross would be a Sussex X RIR but I presume you can’t get them