Egg shade variation from same hen

[Chicksandplants]

Hi! I currently have 2 laying hens, top row is our Buff Orpington, & bottom is our Barred Rock. The BR had been laying a darker egg (far right bottom) until now, and has gotten lighter just this week, almost white now. She started laying in October 2022. Is this normal or a deficiency maybe?

 

[sourland]

Frequently egg color will lighten the further into her laying cycle a hen gets. After taking a break in laying, egg color will intensify.