Parakeet Help I'm so Confused?

One of my parakeet is hand trained. the other one is kinda hand trained. ive had Apollo for a year and Ares for 5 months. here is the thing Apollo ceres i light blue and Ares is blue and purple. what is apollo and what is ares. they both sing a lot. also they come out of the cage when they want to be most of the time they come to me and get on my sholder. I also want to know if they love or not