Blue maran roo crossed with a Welsummer hen will create what color chicks?

[Sheryll_woods]

I have an opportunity to get some blue maran roo/welsummer hen eggs. What color will the chicks be. I am not a science person with colors

 

[NatJ]

Blue Copper Marans?
Half of chicks would look about like Blue Copper Marans, the other half would look about like Black Copper Marans.

Or plain Blue Marans with no copper?
Half of chicks blue, half of chicks black.