Black Jersey Giant Roo over Blue Hen

[Redhead Rae]

I've found the opposite true.
For me splash are very easy to tell but some blues are so dark that they can be mistaken as black.
Silkies are notorious for this. I've raised a black trio once and when I started hatching chicks I was getting blacks, blues and whites.
Ended up being a black rooster that carried recessive white and a blue and a black hen with one or both carrying white.

I remember you talking about what a time you had trying to sort out which bird was carrying which genetics and you wished you had gotten better stock.