That is a beautiful fish, you did a great job raising him, he looks happy and healthy. He is a hybrid (townsend), there is a small amount of queen in him. The pure blues do not have the small patch of blue on the forehead and have a distinct yellow band on the outer edge of the tail. Hybrids between blue and queens have a combination of patterns, this one is mostly blue which means at some point a hybrid bred with a pure blue and then that hybrid bred with another blue and so on so it is mostly blue and the queen angel genes are being bred back out of him.