I was doing a little bit of work with punnett squares on how to get a Midnight Black Shoulder to a Midnight Barred by breeding the Midnight to an Indian Blue Barred. I may have my terms wrong but I hope you can understand what I mean by. This are my results both Genotype and Phenotype. It would take 4 to 6 years at the shortest time.
F1
Pheno: Blue, Barred
Blue, Barred 100.00%
Geno:
Blue, Barred split to Midnight, Black Shoulder 100.00%
F2
Pheno:
Blue, Barred 56.25%
Midnight, Barred 18.75%
Blue, Black Shoulder 18.75%
Midnight, Black Shoulder 6.25%
Geno:
Blue, Barred 6.25%
Blue, Barred split to Midnight, Black Shoulder 25.00%
Blue, Barred split to Midnight 12.50%
Blue, Barred split to Black Shoulder 12.50%
Blue, Black Shoulder 6.25%
Blue, Black Shoulder split to Midnight 12.50%
Midnight, Barred 6.25%
Midnight, Barred split to Black Shoulder 12.50%
Midnight, Black Shoulder 6.25%