I've heard about the "blue pearl" and maybe it's a sign of progress. But remember that anything which you can see, in or out of meditation, is not pure consciousness. The goal is to realize the nature of the mind (by whatever name) which is the seer, the knower of all things. Anything that can be seen is just another object.

So take this as an encouraging sign of progress. But keep going! With patience and effort you will make it to realization.