Get a good rooster from decent show stock, with excellent color in the weak areas, to cross them to. Cull hard for very specific color issues, and you will most likely see a great deal of improvement in a very short time, especially if you do not carry over the original hatchery stock to the next season. Breed some pullets (plan on making 10 for every one you need), using a superior roo (they contribute a lot and it is often easier to see quality issues w/ the boys). Keep the very best of just the new girls, and sell or give away any birds that do not make the cut. Then breed back the daughters on that same top notch roo, again following the rule of 10 and you will have a pretty decent flock to work with if your roo is of excellent quality... but you cannot get quality within a reasonable amount of time unless you bring it in from somewhere else. Even bringing in a top notch roo to cover the best of your girls, you are looking at 3 to 4 years before you can say you have begun to iron out the kinks in your flock. This will save you a ton of headaches, and allow you to use the birds you have now in a meaningful way... but remember you cannot begin to select for color or size until they are around 10 months old.