Her eggs will always be green and they still are the same inside. Blue eggs are created by a gene that causes the shell to be blue. It is the same as a white shell, just with a couple different ingredients on the outside.
If you were to breed your hen, you have a chance that she will pass...
Sorry to hear about your rooster not making it. Keep us posted on your egg colors. I have two little pullets now in the brooder that I'm hoping will lay blue eggs. Actually, one of them might be an olive egger but I'm not sure who her momma is.