Egg color in Marans will vary by bird, even with good breeding stock you will get birds that lay different shades of brown...
Egg color of a particular Marans hen is generally an average of the 2nd dozen eggs laid by that hen... First 12 are not factored in (as they are generally the darkest that bird will ever lay) second 12 collected and averaged is what is used to get that hens egg color.. The first eggs after a molt (or other extended pause in laying) will be the darkest, as the laying cycle progresses the eggs tend to get lighter...
Egg color of a particular Marans hen is generally an average of the 2nd dozen eggs laid by that hen... First 12 are not factored in (as they are generally the darkest that bird will ever lay) second 12 collected and averaged is what is used to get that hens egg color.. The first eggs after a molt (or other extended pause in laying) will be the darkest, as the laying cycle progresses the eggs tend to get lighter...