Yes they are still yellow, not as yellow as when the were chicks, I call them lemon sherbert,,, I am trying to get pics of them but they dont like the camera. When they are facing away from me the under side of their tail just glows yellow.
I would put them both in bachelor pads until they are at least 1 YO, then see how each one acts with the girls (one at a time), then pick the one I want to keep for breeding.
Good luck with your choice!
I have 2 boys now, the one over the flock (at this time) is a bit small but he is really good...