Blue chicken genetics
If you take your Blue rooster and breed him with any hen that isn't solid blue/black, or solid white. pick whatever pattern and base color you like. Then if you take those chicks that are Blue from that hatch and either breed them together or breed to the patterned hen, you'll start to get some interesting things. The pattern may finally come through, but with the Blue diluting black.
That's how Blue Wheaten Ameraucana and Blue Laced Red Wyandottes were created. Obviously with a lot of line breeding back, and extensive selection. You should achieve your goal of an interesting and varied flock within a few generations.