Is there any color to the egg at all? Totally a guess, but I think your pullet is the result of a cross between a CL and a Brown Leghorn due to her beautiful gold and brown coloring. If so, then depending on what crosses were done previously she could either be capable of laying light blue eggs, or may be lacking blue egg genes all together. Give her a few more days to work out her system though. If she is paired with a rooster that hatched from a blue egg then her daughters should lay light blue eggs, but I would work from there on out to cull any white layers from the Legbar line. Best wishes!