Why are my chickens this color?

[Bureshchickenmama]

We hatched our own chicks from our previous chickens we own. There is only one rooster that is a Rhode Island Red, 1 Rhode Island Red Hen, and 2 barredrock hens. As you can see from the picture there is one way lighter than the others. We have to like this, does anyone have any insight?

 

[Hensndoes]

Pics of the parent stock? Hopefully standing on their own in natural light

 

[itspebbl]

You may have accidentally created some Black Sexlinks (red/buff roo over barred hen)
The cockerels have a cuckoo pattern, while the pullets will be black with some gold feathering. This is an article about breeding sexlinks- https://www.backyardchickens.com/ar...rs-what-they-are-and-how-to-breed-them.65934/

Also, of one of your birds was not purebred, they could be carrying some genes that cause unusual coloring