IMO..
You're discus look just fine. It is not uncommon for discus to look pale. They often mirror their surroundings. If you have a black background than they'll be darker. Judging from your pics I think they're in good shape. Erect fins and nice shape for their size.
At 3" you can't really tell how they'll turn out. In fact I would not purchase a discus that is full of color at 3". This would indicate that discus might have been hormoned or stunted. Don't be hung up on the shape just yet, they are entering the ackward teenage years.
Give them a good diet and lots, and lots, and lots of water changes and they'll turn out beautifully.
I think my discus prefer lighted conditions cause they know it's soon feeding time.