I have a young olive egger hen that we bred in the spring (Silver Cuckoo Marans rooster, Snowy Easter Egger hen). This week she laid her first egg, and it was a lovely pale olive color. Day two, she laid another egg (saw her in the box shortly before), same size, but very blue. A beautiful blue, but not the same color as the first. My pic isn't great without natural light this evening. The eggs are a bit more vibrant and jewel tone in person. I know the shell color comes from the blue gene, and the brown is an outer coating... but it seems like she has lost the coating completely in one day? The egg on the left is the same egg in both pictures. It's next to today's egg in one, and next to one of our cuckoo marans eggs in the other.