The problem with most scars is not only the color of the scar, but also the scar tissue that causes the scar to look large and protruding. The only way this tissue can be removed is with scar massage to break this tissue down.
Once the scar tissue has been broken down, the coloration becomes normal skin tone most of the time, and the remaining scar should be only the actual incision line and probably the points at which the stitches were placed. These very tiny and thin scars should be of a color that is almost the same as the skin, probably a little more on the white side.
I had the thumb of my right hand cut of three times (once an accident, followed by corrective surgery, followed by an artificial joint in the base of the thumb), and if I don't point this out, about 99% of the people would not even recognize this.
I think it should be possible to make the scars of a neo Vagina as little visible.
Once I get my bottom surgery done, I will massage those scars like crazy to look as natural as possible down there!