Every "blue" egg I have ever seen, looked to me like it was really a greenish-blue. That may say more about how I describe colors than it says about the actual color of the eggs
The usual understanding is that the eggshell is either blue or white through most of its thickness, and then it can have brown on the outside making the final color look green (brown over blue) or brown (brown over white). But there is the question what shade of "blue" is actually involved. And there's the question of whether some hens do it differently, because people don't actually know everything about how chicken bodies and genes work. It seems there is always a bit more to learn.
I don't know exactly what is going on with your egg, whether the inside is the same color as other EE's eggs or whether it's different.