Cayuga mix runner duck egg color

[Melbyfam]

We just found out that our Cayuga is a drake and fertile. My question is what color will the eggs be if we hatch his offspring, mixed with runner ducks that lay blue eggs, and then those ducks lay eggs.

 

[Yardmom]

If you haven't already, try posting on the genetics thread. It might get the attention of someone who knows.