Yes, it is okay to see some blue. When you move the stone back and forth, those may actually be red (as in reflecting light rather than showing obstruction from the camera). I think the stone looks pretty good. But I'd feel better seeing a picture of the stone and preferably a video of it, too.
It depends on the size of the stone too.
If it is half a carat the blue will be tiny contrast nice features.
If it is 5ct they may appear as not as attractive dark zones.