To match a color and get the finished pearl the right shade, you'll need to make it darker than the finished color will be. Pearl dust will lighten the color of the pearls, so you need to take that into account.
|black and pearl dusts|
Even with the extra black dust, the pearls are going to be lighter than they were originally. They do look like real black pearls, which aren't super dark, but if you want really dark colored pearls you may have to choose to keep them matte instead of dusting them.
If you have a method of dusting pearls and keeping the dark color, please share it!
Kara Buntin owns A Cake To Remember LLC in Richmond VA, and cake supplies online at www.acaketoremember.com and www.acaketoremember.etsy.com