Could be that you mistook a pale Blue for a Splash. Splash can only produce Blue. Blue can range a lot in shade.
I know splash. I know blue. She is a splash, no question. I still have her. I have issue with people who say "blue splash" because there is no such thing. I am not new to this BBS color family. I've owned Orps, Rocks and Ameraucanas in BBS over the last dozen years. This is the hen, my splash Rock.
And the blue Ameraucana hen was this one. She produced two daughters with BR roosters, each completely different, as I said. I have her black pure Ameraucana daughter, Gypsy, still, who is 10 years old.
The daughter I still have, Panda, on the left, with her Orp "son":
Her other daughter, Riley, blue barred, sired by a different BR rooster, with their half sister, Gypsy, sired by my black Ameraucana rooster I had rehomed. You can see that, unlike her sister, Panda, above, Riley has yellow skin and full beard/muffs.
Another picture of their mother.
Actually, these two are from the same line, different hatch than the blue hen above, all Cree Farms. Cree used to raise show stock, but they got out of chickens in favor of other livestock a few years later. The sire of the blue hen that was Panda and Riley and Gypsy's mother was purchased at a show by a friend in CA, who then sent me the eggs she hatched from. I kept her and sold a sister and the cockerel after I got the daughters from her. (that is Georgia clay on my splash Ameraucana hen-she is still alive, almost 10 years old).
This is splash, same as my splash Rock hen. Definitely not light blue, either of them. Someone stole this picture of Snow to sell overpriced eggs on
Ebay. And the BBS girls together. The splash is related to the black but not sisters. The blue is the same hen who produced both the beardless black barred EE and the blue barred bearded yellow legged EE with BR roosters as well as the black hen, Gypsy, beside her.