Will a chicken not lay their egg colour, they are supposed to?

They do look like pure CCL. I'm wondering if maybe B isn't laying yet. I know you said she's over a year but maybe she's a very late bloomer. Here's an article to determine if she is...
https://www.backyardchickens.com/articles/who-is-laying-and-who-is-not-butt-check.73309/
I also thought that maybe she started and her toner has yet to fill up! Lol.

Her sister just started laying as well, both late bloomers, and ya they are 11months old.
It's so weird!

Thanks for this, I'll check it out!
 
I'm assuming that she just has a special, weirdo DNA thingy going on.
Not really weird. It's moderately common for chickens that are "supposed" to lay blue eggs to actually lay white or brown ones.

There are some flocks that do breed true for the blue egg gene, but they aren't as common as everyone would like them to be. It can be difficult to identify and remove every chicken that carries the wrong egg-color genes: roosters don't lay eggs, and hens can lay blue eggs while still carrying the gene for not-blue eggs.

I should also mention the lady that we got them from is incredible reputable and take care of her breed lines.
My other chickens are from her and do what they need to.
It might be one of your other chickens laying the puzzling egg.

Or one of your Cream Legbar pullets might not have the right egg-color genes, in which case you might want to tell the lady who bred the pullet. That would let her know that she has some chickens (the mother and father of that pullet) with the genes for not-blue eggs. She might want to get a DNA test or do some test-mating to figure out which ones are responsible, and remove them from her breeding program.
 
I have raised several Cream Legbars from 2 different sources.

First batch was 4 purchased chicks. These girls were easily sexed at hatch and all produced nice blue eggs.

Second batch I purchased eggs to hatch in my incubator. Hatched 9 chicks. All were easily sexed at hatch. 7 pullets and 2 cockerels. 5 of these females produced nice blue eggs, 2 females produced pale pink eggs just like yours.

I would not breed the cockerels because I was not sure of the egg color gene they carried.

I think this is a common occurance in Legbars. I've seen other threads here questioning the same.
 
Any chance it’s from a brown or tinted layer and there was a bloom “spray” glitch? 😅 one of my orpingtons who lays a light tan egg, sometimes laid a white egg (missing the brown overspray) when she first started up. Same thing after a molt.
Color sprayed on the egg in the reproductive tract is generally varying shades of brown/tan. Blue eggs are blue all the way through. If you look inside a shell, brown eggs are white inside, while blue eggs are blue. Green eggs come from a blue egg layer crossed with a brown egg layer. The brown sprayed over the naturally blue shell causes the different shades of green.
 

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