I had a permanent makeup eyeliner procedure many years ago. At first it was good but wasn't as dark as I wear it or didn't show through my darker skin well enough so she did it again and that did the trick.
I wanted my lips done also but she wouldn't do it. She said all kinds of bad things could happen because I was dark skinned. After a few years I kept pleading with her to do it. We used to work together at the hospital and I asked as a friend for her to do it and I would accept whatever happened as my own fault. I wanted a light pink. She said it would be difficult to put light pink on dark skin. She said she would test overcompensating with a pink way lighter than what I was wanting. It did turn out too light. It didn't look good on me. It might have looked good on a white woman.
She made me wait a year and a half to redo it. She wanted to make sure nothing was going to change about the color. When I went back she changed the color and it looks good now. She thought the extra light base from the first time helped make the color do well the second time.