Black laced red over black laced red should produce black laced red.
The cock shown is not black laced red, however. I can't tell from the photo if he's lightly marked splash laced or blue laced.
Black x black = 100% black
Black x blue = 50% black, 50% blue
Black x splash = 100% blue
Blue x blue = 50% blue, 25% black, 25% splash
Blue x splash = 50% blue, 50% splash
Splash x splash = 100% splash