The purple tri is a washed out blue tri and you see it in the Bully dogs not APBT's. I have never seen a Blue tri of any color in the APBT it is a bully color. Who knows where it came from and who knows what breeds were bred into many of these lines so who cares

Bullies come in blue tri's and that is just how it is now.
I have to agree the son looks great compared to the sire. I want a clean looking bully and the Sire is a little sloppy looking and it looks like that was cleaned up in the son. Thanks I will go check out those kennels.