You want to match the lace color with your scalp complexion not your skin tone. This is because when you part the unit, you want it to appear as your natural scalp color. So to check your scalp color part your hair and look at the color of your scalp to determine your lace color.
Follow These Guidelines - Lace Choice Color:
Transparent: For White, Off White or Cream scalp tones.
Ie. Liv Tyler, Jessica Simpson, Jenna Jameson, Charlize Theron etc.
Medium Brown: For Light Beige or Beige scalp tones.
Ie: Ciara, Eva Mendez, Eva Longoria
Light Brown: For Light Brown scalp tones.
Ie. Tyra Banks, Beyonce, Alica Keys, Rihanna
Dark Brown: For Dark Brown scalp tones.
Ie. Naomi Campbell, Serena Williams, Kelly Rowland