I can't see anything overly concerning with the color.
The first pic I can see some alternating shades of blue in the saddle feathers.
The second pic I can see some very slight brassiness in the hackle.
I only noticed these things after I looked at the pictures several times, over the past day or so. This is just my opinion, I don't think you should worry about it until you see what his final adult plumage comes in. If those things go away, or some other funky things happen with the color, decide what to do then. If color is your main focus this breeding season for you cull him when he is older. If he has things that can add to your breeding program, keep him. Do test matings. What do the males look like that you are not culling? Please explain what you are seeing...........................