Crossing colors in D'uccles

[Cassidy Love]

I am wondering if you can breed a golden neck to a black mottled as the gold necks are sometimes called buff mottled. If I was to cross them what would I get? I really like the gold necks but I cant have another pen of D'uccles I really want gold neck hen but I only have a Mottled and a Self blue rooster
Thanks
Cassidy