So, from what I understand, blue chickens will never breed true 100%. Blue is a result of a dominant gene and a recessive gene inherited together. Call the gene "B" , a blue chick has Bb. (B is dominant, b is recessive for the same gene, chick got one gene from each parent) If a chick gets BB (both dominant) genes, it will be splash. If it gets bb (both recessive) it will be black. So you have to consider all the potential gene combinations for chicks based on what genes the parents have.
When dominant and recessive genes mix to make a new color, it's called incomplete dominance. (I'm not actually sure which one is dominant, but is doesn't really matter since they blend together anyway.)
If both parents are black (bb) they only have b genes to offer, so the chick will always get a b for both mom and dad. All chicks will be bb = black
Same for splash (BB). Breed 2 splash chickens together, all chicks will be splash
If you breed a BB splash to a black bb, Every chick will get a B gene from one parent and a b from the other... all chicks will be Bb or blue!
So what if you breed blue to splash or black? You will get for variety and you can figure the odds of getting a certain color. That's what those weird charts are for.
And, what if you breed blue to blue? Bb to Bb? You can get any of the colors.
The person used Bl/bl instead of Bb. You can ignore the "l" and is works the same way. The chart shows the possible genes from each parent and the 4 ways they can be combined in any one chick.
Sis is here. See ya later! Don't break your brain!
When dominant and recessive genes mix to make a new color, it's called incomplete dominance. (I'm not actually sure which one is dominant, but is doesn't really matter since they blend together anyway.)

If both parents are black (bb) they only have b genes to offer, so the chick will always get a b for both mom and dad. All chicks will be bb = black
Same for splash (BB). Breed 2 splash chickens together, all chicks will be splash
If you breed a BB splash to a black bb, Every chick will get a B gene from one parent and a b from the other... all chicks will be Bb or blue!
So what if you breed blue to splash or black? You will get for variety and you can figure the odds of getting a certain color. That's what those weird charts are for.
And, what if you breed blue to blue? Bb to Bb? You can get any of the colors.

The person used Bl/bl instead of Bb. You can ignore the "l" and is works the same way. The chart shows the possible genes from each parent and the 4 ways they can be combined in any one chick.

Sis is here. See ya later! Don't break your brain!