What is the chances of getting a Black Copper Marans If I breed Blue Marans?

[Turkey Girl]

Hi! I was wondering what the chance would be of getting a Black Marans if I breed two Blue Marans together? Could I get a splash or would they stay blue?
Thanks,
Turkey Girl

 

[MysteryChicken]

Here's a helpful chart.

 

[nicalandia]

25% of getting blacks when crossing two blues together