Naturally impressive is the name of a company with a neat nonsurgical glue on nipple areola for patients who have had breast cancer.
I am impressed with their product, so had to write a blog about their methodology. You actually use your current nipple to make a mold, just like they do with dental impressions. They send you a little at home kit, with extensive directions.
You then mail the impression back to them, and include photos of your nipple areola. They then will try to match the color as closely as they can. They will send you a sample of the closest color samples to you (there are over 60 shades they use) so you can hold it up to your existing areola to color match it.
After you choose the color you think closest, they will make your new nipple areola and send it to you.
Pretty cool.