I thought it was line bred, but I see some also say it is a hybrid. Most guess stuartgranti. I have kept them and find them to be like stuartgranti as well. No special care and ideal for this fish is light solid turquoise color with as little pink as possible. Pretty fish, good when you are looking for peacocks that look nothing alike for an all male tank.
Here is one thing I found.
A linebred Variant of the Aulonocara Chilumba. Originally produced from a mutated Chilumba (recessive gene) and further linebred in Germany to keep the beautiful Turquoise coloration resulting in a new fish. fairly peaceful in terms of Peacocks much like the Chilumba, may not do well with more boisterous peacocks and haps resulting in poor coloration, however exceptions often occur.