What is my duck cross bred?

[AnjKar n Ducks]

My cayuga (if she's that anymore) laid her first egg which kind-of matched what their first egg should look like.
This last week she has laid 5 more eggs which were almost white, like ivory. What is my duck?

Here's what she looks like.


Here's what her first egg looked like.

 

[CascadiaRiver]

I am NOT a duck expert, but shes kinda tall in those images, is there any chance she might have some runner in her?

 

[The Duck Ladie]

Looks like a black runner.

 

[AnjKar n Ducks]

@The Duck Ladie
@CascadiaRiver

That is what I thought because my other cayugas (which came from metzer so they should be pure) have more coloring than her and weigh much more.

She laid 3 eggs last week and my Cayuga laid 18
As you can see hers are almost white compared to the other ones.

Do runners lay this color of eggs??