As scary as it may sound to do, you are far better off finding a wig shop. While they might not have the exact combination on the shelf that you like, you do get to compare styles and colors. Occassionally you find a style you like but the shop does not have in the color you like best. I've found that the shops I've been to are TG friendly. If there is a local support group they may have some insights as to where to go.
If your long term plan is to purchase a human hair wig you are talking serious $$$$ to do a shot in the dark as to what color and style best suits you. Plus you get a second opinion along with a sanity check at a brick & mortar store. Synthetic wigs, unlike human hair wigs, cannot be restyled. What you buy is what you live with.
Buying a wig online I've found entails a fair ammount of risk. Even with more expensive wigs. Color rings only tell you part of the story. A locket of hair is far different looking than a headfull. Plus any of the multi-colored varieties the samples are almost useless.
