I'm curious. Have you held her egg up to a store bought white egg?
If it is a pale blue then you have a Sapphire which is a Leghorn cross with Cream Legbar, though she isn't showing the typical crest, but that hybrid doesn't always have the crest.
If it is a pale blue then you have a Sapphire which is a Leghorn cross with Cream Legbar, though she isn't showing the typical crest, but that hybrid doesn't always have the crest.