You should still get splash but any hens they produce will probably lay lighter eggs. I would put a call out on the buy/sell/trade. People are always looking for good homes for their roosters.
The blue andalusian gene breeds like this:
Black X Black = 100 % black
Black X Blue = 50 % black, 50% blue
Black X Splash = 100% blue
Blue X Splash = 50% blue, 50% splash
Splash X Splash = 100% splash
Blue X Blue = 50% black, 25% splash, 25% blue
Edited to fix third line. Sorry 'bout that.