Eggs changing color?

[RockyMtnMama]

I’m sure this is a silly question, but I can’t figure it out. Four laying hens. All the eggs have been pale blue/green for the last 2 years. I introduced 5 chicks (3 Easter eggers and two Olive eggers) in March, who are now 10 weeks old. One (maybe two) have turned out to be roosters, oddly, they are the Olive eggers.

Here’s where it gets weird… Yesterday I collected eggs like I always do, and two were dark green. They are much darker than their eggs have ever been in their two years. Hopefully it’s clear in the photo. I know the little ones are way too young to be laying. And I’ve always heard that chickens lay the same color throughout their lives, unless they start laying slightly lighter eggs as they age.
I'm hoping one of you experts have some idea!
Even if our little roo was old enough to "entertain the ladies", that wouldn't change the color of the eggs, right?

 

[FarmerGirl101]

How much different are these eggs from what they normally lay? Sometimes too much or too little bloom on an egg will make it appear lighter/darker than they actually are.

 

[Chicken poppy]

Chickens do lay the same color but they can lay different shades sometimes. The pigmentation being a different “step” in the egg making, I think that when the brown is added on the blue shell it creates the olive hue. So if that pigment is darker it looks more olive-y.

 

[RockyMtnMama]

How much different are these eggs from what they normally lay? Sometimes too much or too little bloom on an egg will make it appear lighter/darker than they actually are.

Much darker. I don’t know if you can really tell in the picture, but the two at the top are dark. All the others are very pale blue/green, which is what they have always laid.

 

[RockyMtnMama]

Chickens do lay the same color but they can lay different shades sometimes. The pigmentation being a different “step” in the egg making, I think that when the brown is added on the blue shell it creates the olive hue. So if that pigment is darker it looks more olive-y.

I do recall those things being true, it just seems strange that it would be different from other one day before but anything is possible! And also strange that it happened 10 weeks after we added in the Olive Egger too.