If you want winter layers, your chicks should be hatched from Feb, 1st thru March 31st. These will be the best winter layers. If you want birds who start laying early in their lives, then you need to select chicks from hens that started laying early in their lives. Keep do this for several generations and eventually you will end up with hens that start laying earlier in their lives.
The depth of color of the eggshell is passed on by the cock from genes he inherited from his mother. So if you are looking for good color in your eggs, your cock should come from a hen which laid rich colored eggshells. I don't know which sex or both is responsible for the size and shape of the egg.
Best,
Karen in western PA, USA