Both Snow and Gloria Jean are pearly white with "accent" feathers, not like your hen on the left. I've had light blues here, some very light ones. And the chicks seem to be silvery-pearly white as babies, sometimes with yellow tinge. It's plain to the eye if they're light blue or splash, though photos can skew the light. The splashes are the least hatched of all three colors in BBS, seems to me. Has been that way with all breeds I've had in that color variety.
Alice and Neela, my blue Rocks, both have darker accent feathers. The splashes have gray-blue accent feathers, too, but not many. Splashes do vary a great deal, I've found, as far as the darkness or frequency of the splash-accent feathers, but the base color is always a white, usually what I see as a pearly white, at least to my eye.
What bugs me is that some people insist that what I see with my eyes and know to be true can't be, because genetics, genetics, genetics! It begins to become irritating because they almost get to a point where they are calling me a liar. I know what I saw, I know what I have, I know what I bred, on down the line and I know what I got. That means something is off-kilter in the lineage way, way, WAY back or genetics are not 100% absolute.
Tiny is an example. She had BBS Ameraucana parents, I saw their photos, but she is a throwback to Sumatra genes far back in her lineage. I watched her hatch from her blue egg. She lays a brown egg. Everything about her screams Sumatra, but there were no Sumatras on the property of the person who collected the eggs from her BBS Ameraucana flock. Her blue Amer. breeding rooster came from a farm that, years back, used to breed blue Sumatras. Of course, at some point, Sumatra blood got into that line, but they bred Ameraucanas and continued to, breeding true, sold a rooster to this woman who gave me the eggs and voila, Tiny.