Runner Duck colour help? (Cinnamon)

[Kitei]

We have what we -think- is a pair of cinnamon Runner ducklings, although we'll have to check once we get around to getting photos of them. However, I'm not entirely sure what the genotype for cinnamon is, so I'm not certain what the outcomes of any breedings are.

We do have a Pied blue and Blue drake, as well as a black, and were wondering which would be the best pairing, since we're unsure if our drake is fit for breeding.

Cinnamon x Cinnamon
Cinnamon duck x Blue Pied Drake
Cinnamon duck x Blue Drake

I'd be very interested in the genotype for them, as well.

Thanks,
-Kitei