Brows turned blue after microblading. Is this normal? (Photo)

Hi, I had microblading done 7 days ago. The color desired was dark brown. At the day of the procedure my brows were beautiful. However, now they are almost gone and what is still there is a dark blue color. I asked the person who did the microblading and she said not to worry and that changes on the color would occur and finally would turn back to the dark brown color. I'm panicking now and really trying to figure out whether this is normal or not? Please advice.