You're off to a good start! Your son will love the colors he chose so what anybody besides you and he think isn't important. Still, I bet it will be lovely! I do hope we get to see it. Happy knitting!
I did a crocheted blanket for my granddaughter in bright pink and bright green. That one I couldn't finish fast enough to be rid of it but she loves it. The customer (recipient in this case) is always right, right?