Welcome to BYC. I've never had guinea fowl I do have a lot of roosters. @sourland made a great suggestion. That is exactly what I do with mine, and I've never had to invite one to dinner.
It's not so much the color genetics that I was referring to. I was thinking that because the silkie feathers are so fine, the color might look completely different? Like the porcelain/Blue Cream silkies color looks so different than isabel orpingtons or brahmas, even though it's the same color...