Our yolks were very very dark when the girls first started laying, but after a while they got slightly lighter. I wouldn't call them pale though...I think they still look nice. Mine "free range" around the yard in the morning and evening for a little while, so they eat grass, weeds and bugs. Do yours have access to grass/weeds/bugs, etc? I think that's what gives them a nice color. If yours are always in the coop/run, you could feed them greens as a treat.