Glad you could join the flock! Your reds look quite normal and they will fill out with more colour as they age. The whole feather will probably not be all red in colour. When I had mine towards the bottom of the feather was more a white colour. Mine also varied in the darkness of the red, I had one very dark red and one a little lighter with white tail tips.
Good luck with your reds, they are super laying machines. Be sure to ask any other questions that you may have around the forums there really is a section for everything.
Enjoy BYC and all the chicken chat
ETA - confusion on my part with production and sex link. I had sex link I they did fill out in colour.