I can't make out the color. In the first pic it looks violet and in the second it looks grey, but it is an opline for sure. The black markings are very black and that can be caused by the opaline gene. Lovely bird.
BTW I like your website!
Thank you Dries my site took some time but i think I'm finally happy.. I have no idea how you all know the mutations I'm trying to learn but i get a beauty like this and I'm lost ha ha.. I just fell in Love when i saw this one.